feat: Enhance configuration handling and UI for job management

- Update .gitignore to include new provider files and ensure proper tracking.
- Refactor job and config forms to support multiple configuration selections, improving user experience.
- Implement logic to handle the initialization of skipProcessedFiles with a default value.
- Add new provider form templates for better organization and management of source and destination configurations.
- Enhance tests for provider forms and job configurations to ensure robust functionality.
- Introduce nullable handling for skipProcessedFiles in the database schema and update related migrations.
- Improve error handling and validation in job creation and editing processes.

components/config_form.templ

@@ -131,7 +131,7 @@ func getInitialData(config *db.TransferConfig) string {
 		archivePath = config.ArchivePath
 		archiveEnabled = config.ArchiveEnabled
 		deleteAfterTransfer = config.DeleteAfterTransfer
-		skipProcessedFiles = config.SkipProcessedFiles
+		skipProcessedFiles = config.GetSkipProcessedFiles()
 		maxConcurrentTransfers = config.MaxConcurrentTransfers
 		rcloneFlags = config.RcloneFlags
 	}