Users may choose between filesystem (FS) or S3 to store and manage their media files

closes #225

closes #222

closes #193

update composer dependencies to latest

* add DashboardCard component
* add instance wide podcasts and episodes numbers
* add app.storageLimit environment variable
* divide bytes by 1000 instead of 1024 in stats sql queries

closes #216

closes #196, fixes #198

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

- add pleroma, misskey and fosspay platforms
- update adaures/ipcat-php to fix autoload issue
-
fix Breez and Podcast Guru icons

closes #166, #167, #170

- 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

- 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