feat: add Novita AI as optional LLM provider

[Alex-wuhu]

What this PR does

Adds Novita AI as an optional, drop-in replacement for existing cloud providers in ruvbot.

Usage: Set NOVITA_API_KEY in your environment (optionally NOVITA_MODEL) and ruvbot will route through Novita's OpenAI-compatible endpoint.

This integration uses the OpenAI SDK with Novita's endpoint (https://api.novita.ai/openai) and supports:

• deepseek/deepseek-v3.2
• minimax-minimax-m2.5
• zai-org-glm-5

Changes

• npm/packages/ruvbot/src/integration/providers/NovitaProvider.ts
  • Added a new NovitaProvider class implementing the existing LLMProvider interface.
  • Uses OpenAI SDK client configured with baseURL: https://api.novita.ai/openai.
  • Implements complete, stream, countTokens, getModel, and isHealthy in the same provider pattern as existing providers.
• npm/packages/ruvbot/src/integration/providers/index.ts
  • Exported NovitaProvider and createNovitaProvider.
• npm/packages/ruvbot/src/core/BotConfig.ts
  • Extended llm.provider enum with novita.
  • Added env-based auto-config path for NOVITA_API_KEY/NOVITA_MODEL and default Novita endpoint.
• npm/packages/ruvbot/src/core/types.ts
  • Extended LLMProvider union with novita.
• npm/packages/ruvbot/src/RuvBot.ts
  • Wired provider initialization for NOVITA_API_KEY using createNovitaProvider.
  • Updated missing-config warning/help text to include Novita.
• npm/packages/ruvbot/src/server.ts
  • Added Novita key detection in status endpoint and provider reporting.
• npm/packages/ruvbot/src/api/public/index.html
  • Updated UI warning message to include NOVITA_API_KEY.
• npm/packages/ruvbot/.env.example
  • Added NOVITA_API_KEY and NOVITA_MODEL examples.
• npm/packages/ruvbot/README.md
  • Added Novita env configuration example and troubleshooting note.
• npm/packages/ruvbot/package.json
  • Added openai dependency for the new provider implementation.
• Kept corresponding source parity updates for existing checked-in JS/d.ts artifacts:
  • npm/packages/ruvbot/src/RuvBot.js
  • npm/packages/ruvbot/src/server.js
  • npm/packages/ruvbot/src/core/BotConfig.js
  • npm/packages/ruvbot/src/core/BotConfig.d.ts
  • npm/packages/ruvbot/src/core/types.d.ts

Integration analysis

• Architecture: multi_provider
• Pattern reference: npm/packages/ruvbot/src/integration/providers/OpenRouterProvider.ts and npm/packages/ruvbot/src/integration/providers/index.ts
• Pattern followed: true
• Deviations: none
• Concerns: npm run typecheck could not be fully executed in this environment because tsc is not installed (sh: 1: tsc: not found).

Testing

• Attempted: npm run -s typecheck in npm/packages/ruvbot
• Result: sh: 1: tsc: not found (toolchain missing in this environment)

Runtime behavior is structured to be backward-compatible: existing Anthropic/OpenRouter/Google paths are unchanged unless NOVITA_API_KEY is set.