feat: add MCP tool integration via MCPO (#11)

CONFIGURATION.md

@@ -249,3 +249,23 @@ To migrate from `.env`:
 1. Create a `config.yaml` with your configuration
 2. Set `CONFIG_FILE` environment variable
 3. Set secrets via `STEWARD__*` environment variables
+
+### Setting up GitHub MCP
+
+Configure the GitHub MCP server in `mcp.json` using `mcp-remote` to connect to the remote server:
+
+```json
+"github": {
+  "command": "npx",
+  "args": ["mcp-remote", "https://api.githubcopilot.com/mcp/", "--header", "Authorization: Bearer YOUR_GITHUB_PAT"]
+}
+```
+
+Replace `YOUR_GITHUB_PAT` with your GitHub Personal Access Token from https://github.com/settings/personal-access-tokens/new
+
+**Available GitHub Tools via MCP:**
+- Repository management (list, create, read files, branches, commits)
+- Issues and pull requests (create, update, comment, search)
+- GitHub Actions workflows
+- Code security and scanning
+- And many more - see https://github.com/github/github-mcp-server for full docs