CmdPal: Add keyboard shortcuts to items in File Search extension (#41413)

## Summary of the Pull Request

Adds keyboard shortcuts to `IndexerListItem` commands to mirror those in
**All Apps**.

- Introduces a new `KeyChords` class that defines and manages key chords
for all actions within individual projects, improving code organization
and maintainability (similar to the `Icons` class).
- Adds a `WellKnownKeyChords` class in the shared project that defines
common shortcuts to be used consistently across the entire app.
- Updates `IndexerListItem` to include new command context items with
`RequestedShortcut` properties for:
  - Show in folder (`Ctrl+Shift+E`)  
  - Copy path (`Ctrl+Shift+C`)  
  - Open path in console (`Ctrl+Shift+R`)  
- Updates `AppListItem`, `UWPApplication`, and `Win32Program` to use the
new key chord properties from the `KeyChords` class, ensuring
consistency and maintainability.

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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
- [ ] **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

<!-- Provide a more detailed description of the PR, other things fixed,
or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Apps/Programs/UWPApplication.cs

@@ -87,7 +87,7 @@ public class UWPApplication : IUWPApplication
                 new CommandContextItem(
                     new RunAsAdminCommand(UniqueIdentifier, string.Empty, true))
                 {
-                    RequestedShortcut = KeyChordHelpers.FromModifiers(ctrl: true, shift: true, vkey: VirtualKey.Enter),
+                    RequestedShortcut = KeyChords.RunAsAdministrator,
                 });
 
             // We don't add context menu to 'run as different user', because UWP applications normally installed per user and not for all users.
@@ -97,7 +97,7 @@ public class UWPApplication : IUWPApplication
             new CommandContextItem(
                 new CopyTextCommand(Location) { Name = Resources.copy_path })
             {
-                RequestedShortcut = KeyChordHelpers.FromModifiers(ctrl: true, shift: true, vkey: VirtualKey.C),
+                RequestedShortcut = KeyChords.CopyFilePath,
             });
 
         commands.Add(
@@ -107,14 +107,14 @@ public class UWPApplication : IUWPApplication
                     Name = Resources.open_containing_folder,
                 })
             {
-                RequestedShortcut = KeyChordHelpers.FromModifiers(ctrl: true, shift: true, vkey: VirtualKey.E),
+                RequestedShortcut = KeyChords.OpenFileLocation,
             });
 
         commands.Add(
         new CommandContextItem(
             new OpenInConsoleCommand(Package.Location))
         {
-            RequestedShortcut = KeyChordHelpers.FromModifiers(ctrl: true, shift: true, vkey: VirtualKey.R),
+            RequestedShortcut = KeyChords.OpenInConsole,
         });
 
         commands.Add(

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Apps/Programs/Win32Program.cs

@@ -191,32 +191,32 @@ public class Win32Program : IProgram
             commands.Add(new CommandContextItem(
                     new RunAsAdminCommand(!string.IsNullOrEmpty(LnkFilePath) ? LnkFilePath : FullPath, ParentDirectory, false))
             {
-                RequestedShortcut = KeyChordHelpers.FromModifiers(ctrl: true, shift: true, vkey: VirtualKey.Enter),
+                RequestedShortcut = KeyChords.RunAsAdministrator,
             });
 
             commands.Add(new CommandContextItem(
                     new RunAsUserCommand(!string.IsNullOrEmpty(LnkFilePath) ? LnkFilePath : FullPath, ParentDirectory))
             {
-                RequestedShortcut = KeyChordHelpers.FromModifiers(ctrl: true, shift: true, vkey: VirtualKey.U),
+                RequestedShortcut = KeyChords.RunAsDifferentUser,
             });
         }
 
         commands.Add(new CommandContextItem(
                     new CopyTextCommand(FullPath) { Name = Resources.copy_path })
         {
-            RequestedShortcut = KeyChordHelpers.FromModifiers(ctrl: true, shift: true, vkey: VirtualKey.C),
+            RequestedShortcut = KeyChords.CopyFilePath,
         });
 
         commands.Add(new CommandContextItem(
                     new OpenPathCommand(ParentDirectory))
         {
-            RequestedShortcut = KeyChordHelpers.FromModifiers(ctrl: true, shift: true, vkey: VirtualKey.E),
+            RequestedShortcut = KeyChords.OpenFileLocation,
         });
 
         commands.Add(new CommandContextItem(
                     new OpenInConsoleCommand(ParentDirectory))
         {
-            RequestedShortcut = KeyChordHelpers.FromModifiers(ctrl: true, shift: true, vkey: VirtualKey.R),
+            RequestedShortcut = KeyChords.OpenInConsole,
         });
 
         if (AppType == ApplicationType.ShortcutApplication || AppType == ApplicationType.ApprefApplication || AppType == ApplicationType.Win32Application)