closes #553

update CI4 to 4.6.0 + use codeigniter-vite and vite-plugin-codeigniter to load assets

+ update dependencies to latest

update js & php dependencies to latest and fix rector, phpstan and ecs issues

update js and php dependencies

docs(plugins): add install and share instructions with the official plugins repository for discovery

update castopod-plugins-manager + other dependencies to latest

## [2.0.0-next.4](v2.0.0-next.3...v2.0.0-next.4) (2025-10-07)

### Features

* **plugins:** add `submodule` boolean property to manifest schema ([567d5e01](567d5e01))
* **plugins:** add spark commands to install, add, update and remove plugins using adaures' cpm ([3d0db5c6](3d0db5c6))
* set min PHP version to 8.4 ([94cea0ce](94cea0ce))

### Bug Fixes

* **analytics:** edit permission filters to include podcast id in routes ([02657751](02657751))
* **bundle:** edit rsync filter to include resources/icons directory ([265cbbac](265cbbac))
* **fediverse:** add is_private field to posts to flag private posts and hide them from public views ([8ec42c33](8ec42c33))
* update api schema to pass form data when publishing an episode ([5dce8cb9](5dce8cb9)), closes [#553](#553)

### Internal

* add discourse social network ([96b2df15](96b2df15))
* replace twitter links by bluesky in docs ([b5a403b9](b5a403b9))
* update CI to v4.6.3 + all php and js dependencies ([346c00e7](346c00e7))
* update php and js dependencies to latest ([bbfaa1bf](bbfaa1bf))