Simplify Folder Watcher (#1484)

* Refactored Library Watcher to use Hangfire under the hood.

* Support .kavitaignore at root level.

* Refactored a lot of the library watching code to process faster and handle when FileSystemWatcher runs out of internal buffer space. It's still not perfect, but good enough for basic use.

* Make folder watching as experimental and default it to off by default.

* Revert #1479

* Tweaked the messaging for OPDS to remove a note about download role.

Moved some code closer to where it's used.

* Cleaned up how the events widget reports

* Fixed a null issue when deleting series in the UI

* Cleaned up some debug code

* Added more information for when we skip a scan

* Cleaned up some logging messages in CoverGen tasks

* More log message tweaks

* Added some debug to help identify a rare issue

* Fixed a bug where save bookmarks as webp could get reset to false when saving other server settings

* Updated some documentation on library watcher.

* Make LibraryWatcher fire every 5 mins

UI/Web/src/app/admin/manage-settings/manage-settings.component.html

@@ -77,7 +77,7 @@
         <!-- TODO: Move this to Plugins tab once we build out some basic tables -->
         <div class="mb-3">
             <label for="opds" aria-describedby="opds-info" class="form-label">OPDS</label>
-            <p class="accent" id="opds-info">OPDS support will allow all users to use OPDS to read and download content from the server. If OPDS is enabled, a user will not need download permissions to download media while using it.</p>
+            <p class="accent" id="opds-info">OPDS support will allow all users to use OPDS to read and download content from the server.</p>
             <div class="form-check form-switch">
                 <input id="opds" type="checkbox" aria-label="OPDS Support" class="form-check-input" formControlName="enableOpds">
                 <label for="opds" class="form-check-label">Enable OPDS</label>
@@ -85,7 +85,7 @@
         </div>
 
         <div class="mb-3">
-            <label for="folder-watching" class="form-label" aria-describedby="folder-watching-info">Folder Watching</label>
+            <label for="folder-watching" class="form-label" aria-describedby="folder-watching-info">Folder Watching</label><app-tag-badge [selectionMode]="TagBadgeCursor.Clickable" class="ms-1" ngbTooltip="This feature may not always work reliably">Expiremental</app-tag-badge>
             <p class="accent" id="folder-watching-info">Allows Kavita to monitor Library Folders to detect changes and invoke scanning on those changes. This allows content to be updated without manually invoking scans or waiting for nightly scans.</p>
             <div class="form-check form-switch">
                 <input id="folder-watching" type="checkbox" class="form-check-input" formControlName="enableFolderWatching" role="switch">