* fix(docs): update Coding Plan model list and fix stale references in developer docs
- model-providers.md: expand Coding Plan model table from 3 to 9 models (add qwen3.6-plus, glm-5, kimi-k2.5, MiniMax-M2.5, qwen3-coder-next, glm-4.7) to match the provider registry
- auth.md: update Coding Plan model list to match all 9 models and use the correct date-stamped model ID (qwen3-max-2026-01-23)
- contributing.md: fix Node.js version requirement from 18+ to 22+ to match package.json engines
- sdk-typescript.md: fix nonexistent tool name run_terminal_cmd → run_shell_command
- integration-tests.md: fix file extension from .test.js to .test.ts to match actual test files
- qwen-serve-protocol.md: fix legacy tool name search_file_content → grep_search and remove nonexistent ripgrep tool reference
* fix(docs): add missing qwen3.7-plus to Coding Plan model docs
MODELSTUDIO_MODELS in alibaba-coding-plan.ts defines 10 models, but the
inline list in auth.md and the table in model-providers.md only listed 9,
omitting qwen3.7-plus (1M context, thinking enabled). Add it after
qwen3.6-plus in both, matching the source order.
