Consolidate all common flags into flags.go

- Create individual setup functions for each common flag (quality, override, split, timeout)
- Create setupCommonFlags function that sets up all common flags in one call
- Simplify optimize_command.go and watch_command.go by using setupCommonFlags
- All flags now centralized in flags.go for better maintainability
- All tests continue to pass

Co-authored-by: Belphemur <197810+Belphemur@users.noreply.github.com>

cmd/cbzoptimizer/commands/optimize_command.go

@@ -25,13 +25,11 @@ func init() {
 		Args:  cobra.ExactArgs(1),
 	}
 	
-	setupFormatFlag(command, &converterType, false)
-
-	command.Flags().Uint8P("quality", "q", 85, "Quality for conversion (0-100)")
+	// Setup common flags (format, quality, override, split, timeout)
+	setupCommonFlags(command, &converterType, 85, false, false, false)
+	
+	// Setup optimize-specific flags
 	command.Flags().IntP("parallelism", "n", 2, "Number of chapters to convert in parallel")
-	command.Flags().BoolP("override", "o", false, "Override the original CBZ/CBR files")
-	command.Flags().BoolP("split", "s", false, "Split long pages into smaller chunks")
-	command.Flags().DurationP("timeout", "t", 0, "Maximum time allowed for converting a single chapter (e.g., 30s, 5m, 1h). 0 means no timeout")
 
 	AddCommand(command)
 }