Refactored folder synchronization logic and improved migration handling (#21)

- Updated `MainViewModel` to skip synchronization until folder migration is completed and added metadata syncing when opening books.
- Modified folder migration to detach existing folder books (converting them to standard local files) before starting a fresh scan.
- Added `detachAllFolderBooks` to `RecentFileDao` and `RecentFilesRepository` to facilitate the migration process.
- Updated `MetadataExtractionWorker` to sync local metadata to the folder immediately after extraction.
- Simplified `FolderSyncWorker` by removing legacy migration lookups and streamlining the reconciliation of local and remote metadata.
- Updated `FolderMigrationDialog` UI text to reflect that books are now read directly from folders without duplication.
- Fixed various indentation and formatting issues across several files.

app/src/main/java/com/aryan/reader/MetadataExtractionWorker.kt

@@ -90,7 +90,6 @@ class MetadataExtractionWorker(
                         }
                     }
 
-                    // Only update if we actually found something useful
                     if (coverPath != null || title != null || author != null) {
                         val updatedItem = item.copy(
                             coverImagePath = coverPath ?: item.coverImagePath,
@@ -99,6 +98,13 @@ class MetadataExtractionWorker(
                         )
                         recentFilesRepository.addRecentFile(updatedItem)
                         Timber.tag("MetadataWorker").d("Updated metadata for: ${item.displayName}")
+
+                        try {
+                            recentFilesRepository.syncLocalMetadataToFolder(updatedItem.bookId)
+                            Timber.tag("MetadataWorker").d("Created/Updated JSON for: ${item.displayName}")
+                        } catch (_: Exception) {
+                            Timber.tag("MetadataWorker").w("Failed to save JSON during extraction for ${item.displayName}")
+                        }
                     }
 
                 } catch (e: Exception) {