fix: update badge links to point to repository LICENSE and library guide

fix: correct webhook event from item:updated to note:added for comments

docs: add @ai comment feature for conversational task refinement

docs: add Todoist webhook setup guide for doPost function

docs: simplify API setup - Apps Script auto-requests permissions

fix: correct clasp command from 'open' to 'open-script'

refactor: reposition Sterling as a Google Apps Script library

docs: add Buy Me a Coffee badge to README

Create FUNDING.yml

docs: configure clean commit messages without attribution footers

docs: remove personal vault statistics from README

docs: remove test.js.example and related references

docs: validate and fix documentation discrepancies

remove AI file management feature and update readme

Cleanup of ai-assistant