Feature/mcp server pr3

[dolliecoder]

What type of PR is this?

/kind feature

What this PR does / why we need it:
This PR implements the Kmesh Log MCP Tools (kmesh_log_get and kmesh_log_set).

To make Kmesh AI-Native, AI agents need the ability to inspect and dynamically modify internal debugging states. This PR:

1. Introduces the new mcp/tools/log package.
2. Implements kmesh_log_get: Allows AI agents to retrieve a list of all available loggers or query the active logging level (e.g., debug, info, warn) of a specific logger on a given Kmesh daemon pod.
3. Implements kmesh_log_set: Allows AI agents to dynamically update the logging level of a specific logger in real-time.
4. Registers these tools with the central Kmesh MCP Server.

By exposing these as MCP tools, an AI agent can dynamically increase the logging level to debug, reproduce or observe a failure, retrieve the resulting logs, and then revert the logging level back to info—all autonomously.

Which issue(s) this PR fixes:
Fixes #1922

Special notes for your reviewer:
This tool reuses the existing kmeshctl logic and CreateKmeshPortForwarder to ensure that HTTP API requests hitting the Kmesh daemon (/debug/loggers) follow the exact same security and routing paths as the standard CLI.

Does this PR introduce a user-facing change?:

Added the `kmesh_log_get` and `kmesh_log_set` tools to the Kmesh MCP server, enabling AI agents to dynamically retrieve and modify daemon logging levels.

[kmesh-bot]

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