Docs: Troubleshooting MCP server config

Troubleshooting an mcp config in JSON used by an MCP Client can be frustrating. We currently say in the docs to try running the cmd and args in the terminal and "no output is success" like so:
```
uv \
--directory /Users/dandye/Projects/google__mcp-security/server/gti/gti_mcp \
run \
--env-file /Users/dandye/Projects/google__mcp-security/.env \
server.py
```

I'd like to change or add to that that using MCP Inspector works well:
```
npx @modelcontextprotocol/inspector \
uv \
--directory /Users/dandye/Projects/google__mcp-security/server/gti/gti_mcp \
run \
--env-file /Users/dandye/Projects/google__mcp-security/.env \
server.py
```