Issue Description

The repository needs GitHub metadata files including CODEOWNERS, issue/PR templates, Dependabot configuration, and MCP server integration for GitHub operations.

Additional Context

Files to add:

• .github/CODEOWNERS - Code ownership with wildcard pattern
• .github/ISSUE_TEMPLATE/general-issue.yml - General issue template
• .github/ISSUE_TEMPLATE/instruction-file-request.yml - Copilot instruction request
• .github/ISSUE_TEMPLATE/prompt-request.yml - Prompt template request
• .github/ISSUE_TEMPLATE/chatmode-request.yml - Chat mode request
• .github/ISSUE_TEMPLATE/bug-report.yml - Bug report template
• .github/PULL_REQUEST_TEMPLATE.md - PR template with security warnings
• .github/dependabot.yml - Dependabot configuration for npm and GitHub Actions
• .mcp/github-server.json - MCP server configuration
• .mcp/README.md - MCP setup documentation
• .gitignore - Updated with MCP token exclusions

Priority: Wave 1 (Priority 1) - Can merge in parallel with other Wave 1 PRs

Dependencies: None - independent issue

Testing: Validate YAML syntax, verify templates appear in GitHub UI, test MCP server configuration with VS Code