feat: Add Novita provider integration

[Alex-wuhu]

Summary

Add Novita AI as a new provider to Swarms, following the existing provider pattern.

Changes

CLI Utils (swarms/cli/utils.py)

• Added NOVITA_API_KEY environment variable detection in _detect_active_provider()
• Added NOVITA_API_KEY to check_api_keys() validation

Model Router (swarms/structs/model_router.py)

• Added three Novita AI model recommendations:
  • moonshotai/kimi-k2.5: Kimi K2.5 for complex reasoning and code generation
  • zai-org/glm-5: GLM-5 for multimodal reasoning and general tasks
  • minimax/minimax-m2.5: MiniMax M2.5 for video and multimodal tasks
• Added novita to providers dictionary

Usage

Set the API key:

export NOVITA_API_KEY="your-novita-api-key"

Use with Agent via OpenAI-compatible endpoint:

import os
from swarms import Agent

agent = Agent(
    agent_name="Novita-Agent",
    model_name="moonshotai/kimi-k2.5",
    llm_base_url="https://api.novita.ai/openai",
    llm_api_key=os.getenv("NOVITA_API_KEY"),
    max_loops=1,
)

result = agent.run("Your task here")

Notes

• Endpoint: https://api.novita.ai/openai (OpenAI-compatible)
• API key follows existing provider pattern via NOVITA_API_KEY env var
• No existing code modified — only additions to CLI utils and model router
• Minimal diff, no unrelated refactoring

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