[sdk_v2] migrate c# and js sdk_v2 implementation and build pipeline to public GH repo

[prathikr]

Changes made for public sdk_v2

1. sdk_v2\cs\test\FoundryLocal.Tests\FoundryLocalManagerTest.cs
   removed comment about implementing test-data-shared feature since we already did, no longer need to intercept and mock get_model_list command

2. sdk_v2\cs\test\FoundryLocal.Tests\LOCAL_MODEL_TESTING.md
   changed docs to not expose test-data-shared instructions and just asks user to set TestModelCacheDirName to their model cache

3. sdk_v2\cs\test\FoundryLocal.Tests\Utils.cs
   removed CachePath and Web.ExternalUri config vars

4. .github/workflows/sdk_v2
   modified pipeline to only include debug build for c# sdk as a proof-of-concept
   AZURE_DEVOPS_PAT stored and accessed as a github actions secret (needs to be updated weekly at the moment, can switch to a stable/auto-regenerable access token later)

5. updated readme to not include test-data-shared details and instructs users to set modelCacheDir if they want to customize the tests

6. Removed signing as that requires private auth creds and only needs to be done for official releases

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Project	Deployment	Review	Updated (UTC)
foundry-local	Ready	Preview, Comment	Jan 22, 2026 6:34pm

[skottmckay]

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