Add CHANGELOG.md and automated release tag workflow for v0.1.0

CHANGELOG.md

@@ -0,0 +1,34 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.1.0] - 2026-01-12
+
+### Added
+- Initial release of Odette - Event invitation and RSVP management system
+- Token-based RSVP system with unique links for each guest
+- Event management with date, location, description, and banner images
+- Email invitation sending via Gmail SMTP with nodemailer
+- Party size tracking for attendees
+- Primary email + CC email addresses support for each attendee
+- Batch import features:
+  - Parse attendees from email headers
+  - Upload CSV/TSV files
+  - Copy attendees from other events
+- Admin dashboard for event and attendee management
+- ICS calendar file download for guests
+- Timezone support using IANA timezone identifiers
+- Push notifications via ntfy.sh for RSVP responses
+- SQLite database with automatic runtime migrations
+- Mobile and desktop responsive UI using PicoCSS
+- Docker support with automatic image builds
+- GitHub Actions CI/CD pipeline for testing and releases
+- Comprehensive test suite with Jest
+- TypeScript implementation with Express.js
+- EJS server-side rendering
+- No built-in authentication (designed for reverse proxy auth)
+
+[0.1.0]: https://github.com/cdanis/odette/releases/tag/v0.1.0