Add MCP.Tool and MCP.Prompt inline-typing helpers.
Wrapping inline tool / prompt descriptors with MCP.Tool({...}) or MCP.Prompt({...}) locks generic inference from inputSchema / outputSchema / argsSchema, so callbacks type-check precisely without as any or as const workarounds. Existing inline arrays without the wrapper continue to work unchanged.
Also bumps @gibme/fetch from ^22.0.1 to ^22.1.0.