feat(): adopt official ESLint MCP; remove ds/angular-eslint tool

[poltorak]

Summary

Switch to the official ESLint MCP integration and remove the in-house DS Angular ESLint tool. This reduces maintenance, unifies linting, and simplifies configuration via .cursor/mcp.json.

What changed

• Removed custom DS Angular ESLint tool:
  • Deleted packages/angular-mcp-server/src/lib/tools/ds/angular-eslint/**
• Updated DS tooling aggregation:
  • Edited packages/angular-mcp-server/src/lib/tools/ds/tools.ts
• Config and docs:
  • Edited .cursor/mcp.json (local)
  • Added .cursor/mcp.json.example
  • Edited .cursor/flows/ds-refactoring-flow/04-validate-changes.mdc
  • Edited .cursor/rules/04-validate-changes.mdc
  • Edited README.md
  • Edited .gitignore to ignore local .cursor/mcp.json
  • Updated package-lock.json

Counts: +1 added, ~7 modified, -11 removed

Motivation

• Standardize on the official ESLint MCP server
• Reduce bespoke code and future maintenance
• Provide a clear local config example

Breaking changes

• Removed ds.angular-eslint tool. Consumers should use the official ESLint MCP integration.

Migration

1. Copy .cursor/mcp.json.example to .cursor/mcp.json and adjust to your environment.
2. Replace any ds.angular-eslint usages with the official ESLint MCP tool commands.

How to test

• Ensure .cursor/mcp.json exists locally (use the provided example).
• Start the MCP server and verify ESLint actions are available and functioning via MCP.

Affected areas

• packages/angular-mcp-server (tools registration)
• .cursor/* (MCP config + docs)
• Root docs and lockfile

Notes

• Local config (.cursor/mcp.json) is now ignored by Git; example file is provided for reference.