feat(agents) : Hugging Face Inference provider first-class support and Together API fix and Direct Injection Refactor Auths [AI-assisted] (#13472)

* initial commit

* removes assesment from docs

* resolves automated review comments

* resolves lint , type , tests , refactors , and submits

* solves : why do we have to lint the tests xD

* adds greptile fixes

* solves a type error

* solves a ci error

* refactors auths

* solves a failing test after i pulled from main lol

* solves a failing test after i pulled from main lol

* resolves token naming issue to comply with better practices when using hf / huggingface

* fixes curly lints !

* fixes failing tests for google api from main

* solve merge conflicts

* solve failing tests with a defensive check 'undefined' openrouterapi key

* fix: preserve Hugging Face auth-choice intent and token behavior (#13472) (thanks @Josephrp)

* test: resolve auth-choice cherry-pick conflict cleanup (#13472)

---------

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Peter Steinberger <steipete@gmail.com>

src/commands/onboard-auth.ts

@@ -7,6 +7,8 @@ export {
   applyAuthProfileConfig,
   applyCloudflareAiGatewayConfig,
   applyCloudflareAiGatewayProviderConfig,
+  applyHuggingfaceConfig,
+  applyHuggingfaceProviderConfig,
   applyQianfanConfig,
   applyQianfanProviderConfig,
   applyKimiCodeConfig,
@@ -63,12 +65,14 @@ export {
   setOpenrouterApiKey,
   setSyntheticApiKey,
   setTogetherApiKey,
+  setHuggingfaceApiKey,
   setVeniceApiKey,
   setVercelAiGatewayApiKey,
   setXiaomiApiKey,
   setZaiApiKey,
   setXaiApiKey,
   writeOAuthCredentials,
+  HUGGINGFACE_DEFAULT_MODEL_REF,
   VERCEL_AI_GATEWAY_DEFAULT_MODEL_REF,
   XIAOMI_DEFAULT_MODEL_REF,
   ZAI_DEFAULT_MODEL_REF,