feat: add basic code scanning methods

[SamMorrowDrums]

Adds get_code_scanning_alert and list_code_scanning_alerts.

Examples:

echo '{"jsonrpc":"2.0","id":3,"params":{"name":"get_code_scanning_alert", "arguments": {"repo": "turboscan", "owner": "github", "alert_number": 773}},"method":"tools/call"}' | go run  cmd/server/main.go stdio  | jq .


GitHub MCP Server running on stdio
{
  "jsonrpc": "2.0",
  "id": 3,
  "result": {
    "content": [
      {
        "type": "text",
        "text": "{\"number\":773,\"rule\":{\"id\":\"errcheck\",\"severity\":\"error\",\"description\": ...
      }
    ]
  }
}

echo '{"jsonrpc":"2.0","id":3,"params":{"name":"list_code_scanning_alerts", "arguments": {"repo": "turboscan", "owner": "github"}},"method":"tools/call"}' | go run  cmd/server/main.go stdio  | jq .


GitHub MCP Server running on stdio
{
  "jsonrpc": "2.0",
  "id": 3,
  "result": {
    "content": [
      {
        "type": "text",
        "text": "[{\"number\":773,\"rule\":{\"id\":\"errcheck\",\"severity\":\"error\",\"description...}]"
      }
    ]
  }
}

[Copilot]

Pull Request Overview

This PR adds two new tools to retrieve code scanning alerts from a GitHub repository.

• Introduces getCodeScanningAlert and listCodeScanningAlerts functions in pkg/github/code_scanning.go.
• Updates README.md to include documentation for the new code scanning endpoints.
• Integrates the new code scanning tools in pkg/github/server.go.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
pkg/github/code_scanning.go	New functions to retrieve and list code scanning alerts.
README.md	Added documentation for the new code scanning tools.
pkg/github/server.go	Registers the new code scanning tools to the server.

Tip: Copilot only keeps its highest confidence comments to reduce noise and keep you focused. Learn more