feat(library): exclude configured folders from scanning and analysis

packages/i18n/locales/en/admin.json

@@ -98,6 +98,10 @@
     "delete_confirm": "Delete “{{name}}”? Tracks that exist only in this storage will disappear from the library along with their likes.",
     "scanning": "Scanning: {{processed}} of {{total}}",
     "scan_walking": "Walking folders…",
+    "excluded_dirs": "Folders to exclude from scanning",
+    "excluded_hint": "One folder per line, relative to the storage root. Example: Downloads_PumpEars. All subfolders are excluded too. Paths are case sensitive; wildcards are not supported. Analysis and its errors are excluded as soon as you save. Existing catalog records are retained. An empty list enables scanning and analysis again.",
+    "excluded_running": "Wait for the current scan to finish before editing exclusions.",
+    "excluded_count": "Folders excluded from scanning: {{count}}",
     "scan_walk_progress": "Walking folders… Directories checked: {{dirs}} · audio files found: {{found}}",
     "scan_current_dir": "Current folder: {{path}}",
     "scan_preparing": "Matching files with the library…",