Enable Plugins support
Major Changes:
- Add Plugin runners:
- Library Management - File test
- Worker - Processing file
- Post-processor - File movements
- Post-processor - Marking task success/failure
- Add Plugin Management CLI tool for creating, listing and testing Unmanic Plugins
- Added privacy policy in footer of application web UI
- Added application login support for sponsor only features
- Added builds for ARMv7 and ARM64 Docker images
- Improvements to the SQLite DB connection to fix results timeouts
- Fix bug where an unhandled exception my be thrown when FFMPEG STDOUT included non Unicode characters
- Added link to new http://unmanic.app/ documentation in the WebUI
- Fix bug where files that had failed in history were still being added to task queue on a library scan.