feat: add project aliases and completed time entries

[XAE117]

What changed

• Add optional case-insensitive project aliases loaded from a local JSON file.
• Extend toggl_start_timer with project_alias while rejecting ambiguous ID-plus-alias input.
• Add toggl_create_time_entry for completed entries.
• Add toggl_list_project_aliases for configuration inspection.
• Prefer the documented TOGGL_API_TOKEN name while retaining existing aliases.
• Add Claude Desktop and Claude Code configuration examples, setup documentation, unit coverage, and a live Toggl API smoke test.

Privacy and packaging

The tracked alias file contains sample IDs only. The real config/project-aliases.json is gitignored, and users can point to any external file with TOGGL_PROJECT_ALIASES_FILE.

Verification

• npm run build
• npm test: 37 tests passed
• npm run lint: 0 errors, 19 existing warnings
• npm audit --omit=dev --audit-level=moderate: 0 vulnerabilities
• npm pack --dry-run: package includes compiled output and public example/configuration docs
• Live Toggl API smoke test passed authentication, workspace/project listing, alias listing, recent/current entries, completed-entry creation, timer start/stop, and cleanup