feat: include task IDs in all operation outputs and add ID-based quer…

…ying (fixes greirson#13)

- Update formatTaskForDisplay to show task IDs: "- Task content (ID: 123456)"
- Include IDs in task creation, bulk operations, and subtask responses
- Add task_id parameter to todoist_task_get, update, delete, and complete tools
- Enhance task hierarchy display with IDs
- Add priority and limit parameters to todoist_task_get for better filtering
- Maintain consistent ID format across all outputs
- Make task_name optional in CRUD operations (either task_id or task_name required)
- Update tool descriptions and error messages for ID-based operations

style: fix prettier formatting in test-handlers

chore: release v0.7.0

- Update version to 0.7.0 in package.json
- Add comprehensive v0.7.0 release notes to CHANGELOG.md
- Mark Code Quality Improvement Phase as completed in CLAUDE.md

chore: release v0.6.0

- add comprehensive testing infrastructure
- new test tools: todoist_test_connection, todoist_test_all_features, todoist_test_performance
- fix API response handling for multiple formats
- add integration test suite with proper environment variable handling
- add development PRD documentation
- fix linting issues and improve type safety

Version 0.5.3: Fix API response handling

Bump version to 0.5.2 for deadline fixes

Remove postversion git push to fix CI release workflow

Fix repository URLs in package.json for NPM provenance