Spaces in MCP server names break the MCP tools

Bug Description:

When a space is entered into a MCP server name, the tools will not be usable by Anthropic models nor OpenAI models.

Steps to Reproduce:

1. Add a new MCP server with a space in it, e.g. "My server"
2. Add some of its tools, they will have names like "mcp_My server_my_tool_A"
3. Anthropic and OpenAI models fail with errors like 400 Invalid 'tools[0].function.name': string does not match pattern. Expected a string that matches the pattern '^[a-zA-Z0-9_-]+$'.

Additional Information

• Operating System: Ubuntu 24.04
• Theia Version: 1.75.0