[CmdPal] Extension string updates (#43269)

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## Summary of the Pull Request

Feedback from the design team:
- Reduce any redundant or long text strings for better readability and
localization
- `Verb + noun` for most extensions
- Sentence casing according to the Windows Writing Guidelines


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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

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## Detailed Description of the Pull Request / Additional comments

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---------

Co-authored-by: Michael Jolley <mike@baldbeardedbuilder.com>
Co-authored-by: Jiří Polášek <me@jiripolasek.com>

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WindowsTerminal/Properties/Resources.Designer.cs

@@ -97,7 +97,7 @@ namespace Microsoft.CmdPal.Ext.WindowsTerminal.Properties {
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Open Windows Terminal Profiles.
+        ///   Looks up a localized string similar to Open Windows Terminal profiles.
         /// </summary>
         internal static string list_item_title {
             get {

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.WindowsTerminal/Properties/Resources.resx

@@ -156,7 +156,7 @@
     <value>Settings</value>
   </data>
   <data name="list_item_title" xml:space="preserve">
-    <value>Open Windows Terminal Profiles</value>
+    <value>Open Windows Terminal profiles</value>
   </data>
   <data name="preferred_channel" xml:space="preserve">
     <value>Preferred channel</value>