Add McpToolkit.NET production MCP servers for SQL Server and FileSystem

[SuvBaral]

Hi, I'd like to add McpToolkit.NET to the list.

Repo: https://github.com/SuvBaral/McpToolkit.NET

Category suggestion: MCP Servers (or Samples/Examples)

Description:
Production-ready MCP server implementations for the .NET enterprise stack.
Includes working SQL Server server (list_tables, describe_table, execute_query
with read-only enforcement) and FileSystem server (sandboxed read/write/list).
Built on the official ModelContextProtocol C# SDK.