Add maintenance page

[ildyria]

• [x] : Add button to optimize DB (instead of being in Diagnostics)
• [x] : Add button to check for update
• [x] : Add button to apply update (depending of above result)
• [x] : Add button to clean failed uploads in public/upload/livewire-tmp/
• [x] : Add button to clean empty folders in storage/extract-job/
• [x] : Add button to clean failed import of storage/image-jobs/
• [x] : Add button to clear job history that are stuck in processing state (not that it should happen, but it may)
• [x] : Add button to generate missing thumb images