update CommonMark to v2 + add Autolink, SmartPunct and DisallowedRawHtml extensions

- tempfile uniqueness ensures that each process lives in its independent context
- add
writable/temp folder to store video clips temporary resources
- add videoClipWorkers config to
Admin for specifying the number of ffmpeg processes to run in parallel
- update video clip preview
background to better suit the end result

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

closes #134, #136

go back to form after submitting an edit form

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

fix video colors to portray exact rgb values using libx264rgb encoding + image transparency issue
when overlaying images with php gd

- 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

- refactor meta-tags by generating them in the controller and injecting them into the views
- use
`melbahja/seo` library to build opengraph and twitter meta-tags + schema.org objects

- set new colors using the css variables for theming in tailwind.config.js
- replace admin and
public colors with new variable enabled colors

- 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

fix components in follow and remote action pages by calling new instances directly

- add rounded classes with conditional border-radius depending on screen width
- add ring-castopod
class to use on focus states

- 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