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)

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

docs/concepts/model-providers.md

@@ -120,6 +120,7 @@ OpenClaw ships with the pi‑ai catalog. These providers require **no**
   - OpenAI-compatible base URL: `https://api.cerebras.ai/v1`.
 - Mistral: `mistral` (`MISTRAL_API_KEY`)
 - GitHub Copilot: `github-copilot` (`COPILOT_GITHUB_TOKEN` / `GH_TOKEN` / `GITHUB_TOKEN`)
+- Hugging Face Inference: `huggingface` (`HUGGINGFACE_HUB_TOKEN` or `HF_TOKEN`) — OpenAI-compatible router; example model: `huggingface/deepseek-ai/DeepSeek-R1`; CLI: `openclaw onboard --auth-choice huggingface-api-key`. See [Hugging Face (Inference)](/providers/huggingface).
 
 ## Providers via `models.providers` (custom/base URL)