add run housekeeping button in general settings page

feat(transcript): parse srt subtitles into json file + add max file size info below audio file input

remove episode form warning + add javascript validation when uploading a file to check if it's too
big to upload

number of seasons and episodes + publication date of the first episode

fixes #119

closes #134, #136

go back to form after submitting an edit form

update discord logo

update Forms.Section component to adapt to full width

feat(video-clip): generate video clips in the bg using a cron job + add video clip page + tidy up UI

- configure service-worker using vite-plugin-pwa
- refactor Image entity to generate images of
different types based on size config
- add requirement for webp library for php gd to generate webp
images for instance
- add action to regenerate all instance images for eventual Images config
changes
- enhance google lighthouse metrics for pwa

set 6 base accent colors: pine, lake, jacaranda, crimson, amber and onyx

- rename image fields on podcast, episode and persons for better clarity
- set different sizes
config for podcast cover, banner and persons avatars
- add tiny size for covers
- fix responsive
on admin forms

- add About podcast page
- use different layout for episode pages
- improve on user feedback with
design
- restructure app theme folders
- update js packages to latest versions

fixes #112, closes #55

soundbites js

app, admin, install and authentication views are now located in root themes/ folder