Adds BgcodeThumbnailProvider and BgcodePreviewHandler (#38667)

<!-- 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

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

- [X] **Closes:** #30352
- [X] **Communication:** I've discussed this with core contributors
already. If work hasn't been agreed, this work might be rejected
- [X] **Tests:** Added/updated and all pass
- [X] **Localization:** All end user facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [X] **New binaries:** Added on the required places
- [X] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [X] [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


![image](https://github.com/user-attachments/assets/62c0cbbb-fbca-4bb3-82fe-696ba40da83d)


![image](https://github.com/user-attachments/assets/3f2f1346-91fb-4f49-85b9-8cd6e19e68e9)

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

- Close PowerToys if installed in your machine
- Full build the solution: PowerToys.sln
- Start PowerToys from PowerToys\x64\Debug\PowerToys.exe or
PowerToys\x64\Release\PowerToys.exe
- Toggle the "Binary G-code thumbnail previewer" setting to enable
- Open HelperFiles folder on the tests and check if the icon changes to
an image
- Check explorer preview to see if image is also shown there

---------

Co-authored-by: leileizhang <leilzh@microsoft.com>

src/modules/previewpane/BgcodeThumbnailProviderCpp/BgcodeThumbnailProvider.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "pch.h"
+
+#include <ShlObj.h>
+#include <string>
+#include <thumbcache.h>
+
+class BgcodeThumbnailProvider :
+    public IInitializeWithStream,
+    public IThumbnailProvider
+{
+public:
+    // IUnknown
+    IFACEMETHODIMP QueryInterface(REFIID riid, void** ppv);
+    IFACEMETHODIMP_(ULONG) AddRef();
+    IFACEMETHODIMP_(ULONG) Release();
+
+    // IInitializeWithStream
+    IFACEMETHODIMP Initialize(IStream* pstream, DWORD grfMode);
+
+    // IThumbnailProvider
+    IFACEMETHODIMP GetThumbnail(UINT cx, HBITMAP* phbmp, WTS_ALPHATYPE* pdwAlpha);
+
+    BgcodeThumbnailProvider();
+protected:
+    ~BgcodeThumbnailProvider();
+
+private:
+    // Reference count of component.
+    long m_cRef;
+
+    // Provided during initialization.
+    IStream* m_pStream;
+
+    HANDLE m_process;
+};