feat(plugins): add methods to easily retrieve general, podcast and episode settings in hooks methods

feat(plugins): register plugins using Plugin.php file instead of namespace + simplify i18n structure

update filter permission logic for replacing router param

+ refactor form fields components

- enhance plugin card ui
- refactor components to be more consistent
- invert toggler label for better UX
- edit view components regex

- rename options to settings

+ load plugin icon
+ add pagination
+ autoload plugins in Config/Autoload.php to handle plugin
i18n
+ style plugin cards

This prevents memory exhaustion when downloading large files

- change language keys to kebab-case
- add new languages to docs: ca, de, es, sr-latn, zh-hans

fixes #473