Setting search (#41285)

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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request

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## PR Checklist

- [ ] Closes: #xxx
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [x] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

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## Validation Steps Performed
Localized search:
<img width="1576" height="480" alt="image"
src="https://github.com/user-attachments/assets/dd6e5e9f-419b-40b1-b796-f0799481ecfc"
/>


## AI summary
This pull request introduces infrastructure and code to support search
functionality for PowerToys settings, including a new search index
specification, a dedicated search library, and updates to the solution
configuration. The main changes are the addition of a spec describing
how settings should be indexed and navigated, the creation of a new
`Common.Search` project with a fuzz search implementation, and updates
to the solution file to include these new components.

**Settings Search Feature Implementation**

* Documentation:
* Added a detailed specification (`settings-search.md`) describing the
structure of PowerToys settings pages, how to index settings, navigation
logic, runtime search, result grouping, build-time indexing strategy,
and corner cases.

* New Search Library:
* Added the new `Common.Search` project to the solution, including its
project file and implementation of a fuzz search service
(`FuzzSearchService<T>`), match options, match results, and search
precision scoring.
[[1]](diffhunk://#diff-ddc06fa41e4e723e54181b0cb85cdd00f57f75725d51ceefa242d4d651a9a363R1-R8)
[[2]](diffhunk://#diff-1a2ca29fc33bcccf338a7843a040ca2c31ba821e8cab7064fab0dbb1224d454cR1-R39)
[[3]](diffhunk://#diff-242764d948b795f39653a84d9b6bfcdc52730100deab2e3a0995be95bb8e7868R1-R10)
[[4]](diffhunk://#diff-61e525491ed916ebd65dabb66dd4f5dc720320d7e295ef1e0bd6d506ea0f7df6R1-R67)
[[5]](diffhunk://#diff-a775f6de2e8d42982829b4161668f49dedbbd9dcbb05ce20003de7e62275c57aR1-R12)

* Solution Configuration:
* Updated `PowerToys.sln` to include `Common.Search` and
`Settings.UI.XamlIndexBuilder` projects, and configured their build
settings for various platforms and mapped project dependencies.
[[1]](diffhunk://#diff-ca837ce490070b91656ffffe31cbad8865ba9174e0f020231f77baf35ff3f811R714-R716)
[[2]](diffhunk://#diff-ca837ce490070b91656ffffe31cbad8865ba9174e0f020231f77baf35ff3f811R2704-R2727)
[[3]](diffhunk://#diff-ca837ce490070b91656ffffe31cbad8865ba9174e0f020231f77baf35ff3f811R2889)
[[4]](diffhunk://#diff-ca837ce490070b91656ffffe31cbad8865ba9174e0f020231f77baf35ff3f811R3157-R3158)

**Spell-check Dictionary Updates**

* Added new terms related to navigation and settings UI components (such
as `Navigatable`, `NavigatablePage`, `settingscard`, `Tru`, `tweakable`)
to the spell-check dictionary to support the new search and indexing
features.
[[1]](diffhunk://#diff-5dcab162c1b233a49973ae010f2b88c7ec4844382abd705e6154685e62bd5c4dR1020-R1021)
[[2]](diffhunk://#diff-5dcab162c1b233a49973ae010f2b88c7ec4844382abd705e6154685e62bd5c4dR1498)
[[3]](diffhunk://#diff-5dcab162c1b233a49973ae010f2b88c7ec4844382abd705e6154685e62bd5c4dR1755-R1761)

---------

Co-authored-by: Niels Laute <niels.laute@live.nl>
Co-authored-by: Gordon Lam (SH) <yeelam@microsoft.com>
Co-authored-by: Gordon Lam <73506701+yeelam-gordon@users.noreply.github.com>

src/settings-ui/Settings.UI/SettingsXAML/Views/CmdPalPage.xaml

@@ -1,9 +1,10 @@
-<Page
+<local:NavigatablePage
     x:Class="Microsoft.PowerToys.Settings.UI.Views.CmdPalPage"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:controls="using:Microsoft.PowerToys.Settings.UI.Controls"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:local="using:Microsoft.PowerToys.Settings.UI.Helpers"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     xmlns:tkcontrols="using:CommunityToolkit.WinUI.Controls"
     xmlns:ui="using:CommunityToolkit.WinUI"
@@ -14,6 +15,7 @@
         <controls:SettingsPageControl.ModuleContent>
             <StackPanel ChildrenTransitions="{StaticResource SettingsCardsAnimations}" Orientation="Vertical">
                 <tkcontrols:SettingsCard
+                    Name="CmdPalEnableCmdPal"
                     x:Uid="CmdPal_Enable_CmdPal"
                     HeaderIcon="{ui:BitmapIcon Source=/Assets/Settings/Icons/CmdPal.png}"
                     IsEnabled="{x:Bind ViewModel.IsEnabledGpoConfigured, Mode=OneWay, Converter={StaticResource BoolNegationConverter}}">
@@ -27,7 +29,10 @@
                     Severity="Informational" />
 
                 <controls:SettingsGroup x:Uid="CmdPal_Activation_GroupSettings" IsEnabled="{x:Bind ViewModel.IsEnabled, Mode=OneWay}">
-                    <tkcontrols:SettingsCard x:Uid="CmdPal_ActivationShortcut" HeaderIcon="{ui:FontIcon Glyph=&#xEDA7;}">
+                    <tkcontrols:SettingsCard
+                        Name="CmdPalActivationShortcut"
+                        x:Uid="CmdPal_ActivationShortcut"
+                        HeaderIcon="{ui:FontIcon Glyph=&#xEDA7;}">
                         <controls:ShortcutControl
                             MinWidth="{StaticResource SettingActionControlMinWidth}"
                             HotkeySettings="{x:Bind Path=ViewModel.Hotkey, Mode=OneWay}"
@@ -47,4 +52,4 @@
             <controls:PageLink x:Uid="LearnMore_CmdPal" Link="https://aka.ms/PowerToysOverview_CmdPal" />
         </controls:SettingsPageControl.PrimaryLinks>
     </controls:SettingsPageControl>
-</Page>
+</local:NavigatablePage>