[Feature] Add Weather API MCP Server Support

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Summary

Add support for the @modelcontextprotocol/weather MCP server to Agentic Firewall, enabling secure, policy-driven access to weather data tools.
Directory: MCP/weather/weather.py

Motivation

Currently, Agentic Firewall only supports the filesystem MCP server. Weather data is a common use case for AI agents, and users need the same security controls (whitelisting, argument validation, audit logging) for weather API calls.

Proposed Implementation

• Add Weather Server Configuration

• Update mcp_governor.py to support multiple MCP servers:

• Implementation same as filesystem or as its fits.