[CmdPal] Extension string updates (#43269)

<!-- Enter a brief description/summary of your PR here. What does it
fix/what does it change/how was it tested (even manually, if necessary)?
-->
## 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


<!-- Please review the items on the PR checklist before submitting-->
## 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

---------

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

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

@@ -149,10 +149,10 @@
     <value>Shutdown</value>
   </data>
   <data name="Microsoft_plugin_ext_connection_details" xml:space="preserve">
-    <value>Connection Details</value>
+    <value>Connection details</value>
   </data>
   <data name="Microsoft_plugin_ext_adapter_details" xml:space="preserve">
-    <value>Adapter Details</value>
+    <value>Adapter details</value>
   </data>
   <data name="Microsoft_plugin_ext_copy" xml:space="preserve">
     <value>Copy to clipboard</value>
@@ -161,10 +161,10 @@
     <value>Hide disconnected network info</value>
   </data>
   <data name="Microsoft_plugin_ext_system_page_title" xml:space="preserve">
-    <value>Windows System Commands</value>
+    <value>Windows system commands</value>
   </data>
   <data name="Microsoft_plugin_ext_system_page_name" xml:space="preserve">
-    <value>System Commands</value>
+    <value>System commands</value>
   </data>
   <data name="Microsoft_plugin_sys_AdapterName" xml:space="preserve">
     <value>Adapter name</value>
@@ -327,7 +327,7 @@
     <comment>This should align to the action in Windows of a restarting your computer.</comment>
   </data>
   <data name="Microsoft_plugin_sys_restart_computer_confirmation" xml:space="preserve">
-    <value>You are about to restart this computer, are you sure?</value>
+    <value>You are about to restart this computer. Are you sure?</value>
     <comment>This should align to the action in Windows of a restarting your computer.</comment>
   </data>
   <data name="Microsoft_plugin_sys_restart_computer_description" xml:space="preserve">
@@ -381,7 +381,7 @@
     <value>State</value>
   </data>
   <data name="Microsoft_plugin_sys_Suffix" xml:space="preserve">
-    <value>DNS Suffix</value>
+    <value>DNS suffix</value>
   </data>
   <data name="Microsoft_plugin_sys_TunnelConnection" xml:space="preserve">
     <value>Tunnel</value>
@@ -391,15 +391,15 @@
     <comment>Means type like category. Here it means network interface type (ethernet, wifi, ...).</comment>
   </data>
   <data name="Microsoft_plugin_sys_uefi" xml:space="preserve">
-    <value>UEFI Firmware Settings</value>
+    <value>UEFI firmware settings</value>
     <comment>This should align to the action in Windows Recovery Environment that restart into uefi settings.</comment>
   </data>
   <data name="Microsoft_plugin_sys_uefi_confirmation" xml:space="preserve">
-    <value>You are about to reboot this computer into UEFI Firmware Settings menu, are you sure?</value>
+    <value>You are about to reboot this computer into UEFI firmware settings menu, are you sure?</value>
     <comment>This should align to the action in Windows Recovery Environment that restart into uefi settings.</comment>
   </data>
   <data name="Microsoft_plugin_sys_uefi_description" xml:space="preserve">
-    <value>Reboot computer into UEFI Firmware Settings (Requires administrative permissions.)</value>
+    <value>Reboot computer into UEFI firmware Settings (requires administrative permissions.)</value>
     <comment>This should align to the action in Windows Recovery Environment that restart into uefi settings.</comment>
   </data>
   <data name="Microsoft_plugin_sys_Unknown" xml:space="preserve">
@@ -415,7 +415,7 @@
     <value>Sleep</value>
   </data>
   <data name="Microsoft_plugin_ext_fallback_display_title" xml:space="preserve">
-    <value>Open System Command</value>
+    <value>Execute system commands</value>
   </data>
   <data name="Microsoft_plugin_sys_RestartShell" xml:space="preserve">
     <value>Restart Windows Explorer</value>