[AOT] move some LibraryImport define to common to avoid dup code

[moooyo]

Summary of the Pull Request

To avoid dup code, try to move some LibraryImport define to common folder.
This can make other modules/extensions easy to use.

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 for new binaries
  • WXS for installer for new binaries and localization folder
  • YML for CI pipeline for new test projects
  • YML for signed pipeline
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Validation Steps Performed

[Copilot]

Pull Request Overview

This PR consolidates LibraryImport definitions into a common location and updates native interop calls across multiple modules to use the new common implementations.

• Removed duplicated native helper code from the Indexer project.
• Added project references to ManagedCsWin32 and updated interop calls accordingly.
• Refactored COM instantiation parameters and shell execution calls to align with the common libraries.

Reviewed Changes

Copilot reviewed 28 out of 28 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Indexer/Native/NativeHelpers.cs	Removed duplicate native constants and helper definitions.
src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Indexer/Microsoft.CmdPal.Ext.Indexer.csproj	Added ManagedCsWin32 project reference.
src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Indexer/Indexer/Utils/QueryStringBuilder.cs	Updated COM instantiation call to use ManagedCsWin32 definitions and CLSCTX.ALL.
src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Indexer/Indexer/Utils/NativeHelpers.cs	Introduced new common native helpers.
src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Indexer/Indexer/SystemSearch/IGetRow.cs	Removed dependency on old native definitions.
src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Indexer/Indexer/SearchQuery.cs	Updated COM instantiation and removed obsolete native usages.
Other files (such as OpenWithCommand.cs, OpenPropertiesCommand.cs, ReparsePoint.cs, etc.)	Updated interop calls to reference ManagedCsWin32 instead of duplicated native implementations.
PowerToys.sln	Added ManagedCsWin32 project to the solution and updated configuration mappings.

Comments suppressed due to low confidence (1)

src/modules/cmdpal/ext/Microsoft.CmdPal.Ext.Indexer/Indexer/Utils/QueryStringBuilder.cs:35

• The change from a specific CLSCTX value (NativeHelpers.CLSCTXINPROCALL) to CLSCTX.ALL might alter COM instantiation behavior. Please verify that using the broader context 'CLSCTX.ALL' is intentional and has been validated.

var hr = Ole32.CoCreateInstance(ref Unsafe.AsRef(in CLSID.SearchManager), IntPtr.Zero, (uint)CLSCTX.ALL, ref Unsafe.AsRef(in IID.ISearchManager), out searchManagerPtr);

[yeelam-gordon]

See if need to discuss with my suggestion.