Add tool use routing mechanism and update configuration

[binbinsh]

To support model providers (e.g. Poe API) or models that does not support tool use.

• Introduced a new "toolUse" configuration in config.json to support tool/function calls.
• Enhanced the router logic in router.ts to handle tool use routing, including checks for ongoing tool conversations.
• Updated README files to document the new "toolUse" feature.
• Added corresponding UI components and localization for "toolUse" in both English and Chinese.
• Updated package-lock.json with new dependencies for the UI components.

Example usage:

{
  // ...
  "Providers": [
    // ...
    {
      "name": "lmstudio",
      "api_base_url": "http://localhost:1234/v1/chat/completions",
      "api_key": "not_needed",
      "models": [
        "gpt-oss-20b",
        "gpt-oss-120b"
      ],
      "transformer": {
        "use": [
          ["maxtoken", {"max_tokens": 131072}],
          "enhancetool"
        ]
      }
    },
    {
      "name": "poe",
      "api_base_url": "https://api.poe.com/v1/chat/completions",
      "api_key": "YOUR_POE_API",
      "models": [
        "gpt-5",
        "claude-opus-4.1"
      ],
      "transformer": {
        "use": [
          "cleancache",
          ["tooluse-router", {"toolUseModel": "lmstudio,gpt-oss-20b"}]
        ]
      }
    }
  ],
  "Router": {
    // ...
    // change the tool use model globally
    "toolUse": "lmstudio,gpt-oss-20b"
  }
}

[listeng]

Poe now fully supports tool usage.