Add MiniMax M2 model to vercel

[nicognaW]

model page: https://vercel.com/ai-gateway/models/minimax-m2

i copied most contents from providers/opencode/models/minimax-m2.toml, and changed context to 205000 according to the raw data in vercel's page:

{
  "slug": "minimax-m2",
  "displayName": "MiniMax M2",
  "creatorOrganization": "minimax",
  "type": "chat",
  "providers": [
    "minimax"
  ],
  "copyString": "minimax/minimax-m2",
  "description": "MiniMax-M2 redefines efficiency for agents. It is a compact, fast, and cost-effective MoE model (230 billion total parameters with 10 billion active parameters) built for elite performance in coding and agentic tasks, all while maintaining powerful general intelligence.",
  "isAggregated": true,
  "contextSize": 205000,
  "inputCost": "0",
  "outputCost": "0",
  "cachedInputCost": "$undefined",
  "cacheCreationInputCost": "$undefined",
  "tags": [
    "reasoning",
    "tool-use"
  ]
}

[rekram1-node]

Thank u!