update composer dependencies to latest

Some episodes could not be unpublished because of out of range error when removing posts.

fixes #233

- remove delete_at field + soft delete for media and pages
- update CodeIgniter4 to 4.2.0 + update all starter files
- explicitly use builder() when creating queries from model 

- update CI4 to v4.1.9's stable production package
- update php and js dependencies to latest

remove cache when adding comment and replies as well

fixes #169

- rename podlibre to adaures
- rename castopod-host to castopod
- simplify README and redirect to docs site
- move INSTALL and UPDATE docs
- add new gitlabci pipeline to deploy docs
- upgrade node to v16 in Dockerfile

fixes #164

rename episode activity cache

set two toggle switches to run housekeeping tasks seperately if needed

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

- 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

- 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

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

- update Component class structure and remove component helper function and ComponentLoader
- update residual activitypub naming to fediverse

- create Admin, Analytics, Auth, Fediverse and Install modules in the root modules/ folder
- rename
ActivityPub to Fediverse

- remove confusing counts for episode (total favourites, total reblogs)
- add comments section to
episode page to display episode comments + post replies linked to the episode