Add timeout configuration to git-mcp-server

## Description
Currently, the git-mcp-server configuration doesn't specify a timeout value, which may cause issues with long-running operations. We should add a timeout configuration of 18 seconds to ensure operations complete in a reasonable time frame.

## Proposed Changes
Update the git-mcp-server configuration in `mcp/mcp.json` to include a timeout setting:

```json
"git": {
"command": "python",
"args": ["/home/linuxmint-lp/ppv/pillars/git-mcp-server/main.py"],
"disabled": false,
"autoApprove": [],
"timeout": 18000 // 18 seconds in milliseconds
}
```

## Parent Issue
This is a sub-issue of #161 (Add git-mcp-server configuration)

## Acceptance Criteria
- [ ] Add timeout configuration to git-mcp-server in mcp.json
- [ ] Test that operations don't hang indefinitely
- [ ] Verify that the timeout is appropriate for typical git operations

Open mcp/mcp.json and inspect the existing git-mcp-server configuration. Add the requested 18000-millisecond timeout, then exercise typical git operations to confirm the timeout is present and operations do not hang indefinitely.

Written by the indexing model from the issue text.