gcloud-mcp: improve rendering of gcloud table outputs

May be a gemini-cli formatting issue rather than a mcp issue. Feel free to close if not relevant to mcp.

### Server

gcloud-mcp

### What did you do?

Prompt: Show my all my quota limits for Compute Engine

### What did you see happen?

### What did you expect to see?

Table formatted properly

Start by reproducing the reported prompt, “Show my all my quota limits for Compute Engine,” against gcloud-mcp and inspect the resulting table output. Compare whether the formatting problem originates in gcloud-mcp or Gemini CLI; done means the quota table renders properly in the responsible component.

Written by the indexing model from the issue text.