- refactor model / entity and controller logic for DRY code
- update episodes and podcasts
migrations
- define callbacks for podcast and episode models for enclosure update and cache
clearing

- refactor episode, podcast and category entities to add dynamic properties
- refactor Routes when adding feed route
- update migration files to better fit itunes' and rss' specs
- update podcast and episode forms
- add SimpleRSSElement class to Libraries
- add rss_helper
- update home controller to redirect if system has only one podcast

- add $mediaRoot parameter in app config
- add and refactor helpers : id3, media and url
- add basic vscode settings for code formatting in devcontainer.json
- set post_max_size to Dockerfile