Initial commit: project scaffold, full spec, database schema, bot and cron

- SPEC.md: full project specification from design discussion
- schema.sql: SQLite database schema
- db.py: database wrapper with all query functions
- bot.py: telegram bot entrypoint
- commands.py: all command handlers with admin/creator guards
- cron.py: daily reminder job
- requirements.txt: python-telegram-bot, dateparser
- README.md, CONTRIBUTING.md
- .gitignore

.gitignore

@@ -0,0 +1,30 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# Environments
+.env
+.venv/
+venv/
+env/
+
+# Database
+*.db
+
+# Logs
+*.log
+
+# Distribution
+dist/
+build/
+*.egg-info/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# macOS
+.DS_Store