Install project MCP configs and generated gitignore

[alexstyl]

Summary

• Resolve the Gradle project root from the current directory before installing project-scoped MCP configs.
• Allow installs from nested project folders while writing config files at the root.
• Fail clearly outside a Gradle project for project-scoped clients.
• Move Antigravity, Firebender, and Zed installs to their documented project/workspace config files.
• Include a CMP-oriented .gitignore in generated projects and ensure it is packaged in the CLI.

Project-scoped installs

• Antigravity: <root>/.agents/mcp_config.json
• Claude Code: <root>/.mcp.json
• Codex: <root>/.codex/config.toml
• Cursor: <root>/.cursor/mcp.json
• Firebender: <root>/firebender.json
• OpenCode: <root>/opencode.json
• Zed: <root>/.zed/settings.json

Android Studio stays IDE-profile scoped because I did not find a project-specific MCP config path for Android Studio.

Sources checked

• shadcn MCP docs: project .mcp.json for Claude Code, project .cursor/mcp.json for Cursor, ~/.codex/config.toml and project .codex/config.toml support for Codex pattern.
• OpenAI Codex docs: Codex supports user ~/.codex/config.toml and project .codex/config.toml for MCP.
• Cursor docs/search result and shadcn docs: project .cursor/mcp.json; global also exists but project-level is supported.
• Firebender docs: project firebender.json, global ~/.firebender/firebender.json.
• Zed docs: MCP servers are configured in settings; Zed supports project .zed/settings.json.
• OpenCode docs: project opencode.json in project root and MCP under mcp.
• Antigravity docs: workspace-local .agents/mcp_config.json, global ~/.gemini/config/mcp_config.json.

Verification

• ./gradlew spotlessCheck :cli:test :cli:integrationTest