Add Verbose log level between Info and Debug

Implemented full log level hierarchy: Fatal, Error, Warn, Info, Verbose, Debug.
- Verbose level (-v) shows detailed operations like file changes (M/A/D)
- Debug level (-vv) shows low-level tracing with caller info
- Quiet mode (-q) sets level to Error, suppressing Info messages
- Banner and summary output now use log levels for filtering

internal/cli/mfer.go

@@ -41,7 +41,7 @@ const banner = `
     \__\/         \__\/       \__\/         \__\/`
 
 func (mfa *CLIApp) printBanner() {
-	_, _ = fmt.Fprintln(mfa.Stdout, banner)
+	log.Info(banner)
 }
 
 // VersionString returns the version and git revision formatted for display.
@@ -49,10 +49,12 @@ func (mfa *CLIApp) VersionString() string {
 	return fmt.Sprintf("%s (%s)", mfa.version, mfa.gitrev)
 }
 
-func (mfa *CLIApp) setVerbosity(v int) {
+func (mfa *CLIApp) setVerbosity(quiet bool, v int) {
 	_, present := os.LookupEnv("MFER_DEBUG")
 	if present {
 		log.EnableDebugLogging()
+	} else if quiet {
+		log.SetLevel(log.ErrorLevel)
 	} else {
 		log.SetLevelFromVerbosity(v)
 	}
@@ -98,10 +100,8 @@ func (mfa *CLIApp) run(args []string) {
 				Aliases: []string{"gen"},
 				Usage:   "Generate manifest file",
 				Action: func(c *cli.Context) error {
-					if !c.Bool("quiet") {
-						mfa.printBanner()
-					}
-					mfa.setVerbosity(verbosity)
+					mfa.setVerbosity(c.Bool("quiet"), verbosity)
+					mfa.printBanner()
 					return mfa.generateManifestOperation(c)
 				},
 				Flags: []cli.Flag{
@@ -138,10 +138,8 @@ func (mfa *CLIApp) run(args []string) {
 				Usage:     "Validate files using manifest file",
 				ArgsUsage: "[manifest file]",
 				Action: func(c *cli.Context) error {
-					if !c.Bool("quiet") {
-						mfa.printBanner()
-					}
-					mfa.setVerbosity(verbosity)
+					mfa.setVerbosity(c.Bool("quiet"), verbosity)
+					mfa.printBanner()
 					return mfa.checkManifestOperation(c)
 				},
 				Flags: []cli.Flag{
@@ -167,10 +165,8 @@ func (mfa *CLIApp) run(args []string) {
 				Usage:     "Update manifest with changed, new, and removed files",
 				ArgsUsage: "[manifest file]",
 				Action: func(c *cli.Context) error {
-					if !c.Bool("quiet") {
-						mfa.printBanner()
-					}
-					mfa.setVerbosity(verbosity)
+					mfa.setVerbosity(c.Bool("quiet"), verbosity)
+					mfa.printBanner()
 					return mfa.freshenManifestOperation(c)
 				},
 				Flags: []cli.Flag{
@@ -209,10 +205,8 @@ func (mfa *CLIApp) run(args []string) {
 				Name:  "fetch",
 				Usage: "fetch manifest and referenced files",
 				Action: func(c *cli.Context) error {
-					if !c.Bool("quiet") {
-						mfa.printBanner()
-					}
-					mfa.setVerbosity(verbosity)
+					mfa.setVerbosity(c.Bool("quiet"), verbosity)
+					mfa.printBanner()
 					return mfa.fetchManifestOperation(c)
 				},
 			},