Implement temp file cleanup for chartify and helmfile temp files

Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>

cmd/root.go

@@ -68,6 +68,14 @@ func NewRootCmd(globalConfig *config.GlobalOptions) (*cobra.Command, error) {
 			}
 			logger = helmexec.NewLogger(logOut, logLevel)
 			globalConfig.SetLogger(logger)
+
+			// Clean up old temporary files if enabled
+			if globalConfig.CleanupTempFiles {
+				if err := app.CleanupTempFiles(logger); err != nil {
+					logger.Warnf("Failed to cleanup temporary files: %v", err)
+				}
+			}
+
 			return nil
 		},
 	}
@@ -141,6 +149,7 @@ The name of a release can be used as a label: "--selector name=myrelease"`)
 	fs.BoolVar(&globalOptions.EnableLiveOutput, "enable-live-output", globalOptions.EnableLiveOutput, `Show live output from the Helm binary Stdout/Stderr into Helmfile own Stdout/Stderr.
 It only applies for the Helm CLI commands, Stdout/Stderr for Hooks are still displayed only when it's execution finishes.`)
 	fs.BoolVarP(&globalOptions.Interactive, "interactive", "i", false, "Request confirmation before attempting to modify clusters")
+	fs.BoolVar(&globalOptions.CleanupTempFiles, "cleanup-temp-files", true, "Clean up temporary files and directories from previous runs on startup")
 	// avoid 'pflag: help requested' error (#251)
 	fs.BoolP("help", "h", false, "help for helmfile")
 }