fix: direct CLI output to stdout instead of stderr (#121)

Fixes #120

Cobra's cmd.Print* methods default to stderr when no output writer
is set. This causes commands like 'batt status' to write their output
to stderr, making redirection (e.g., 'batt status > file.txt')
capture nothing.

Adding cmd.SetOut(os.Stdout) ensures normal command output goes to
stdout while errors and diagnostics remain on stderr.

Author: clarabennettdev

cmd/batt/main.go

@@ -136,6 +136,12 @@ Report issues: https://github.com/charlie0129/batt/issues`,
 		}
 	}
 
+	// Direct cmd.Print* output to stdout instead of the default stderr.
+	// This ensures normal command output (e.g., batt status) goes to stdout,
+	// while only errors and diagnostics go to stderr.
+	// See: https://github.com/charlie0129/batt/issues/120
+	cmd.SetOut(os.Stdout)
+
 	globalFlags := cmd.PersistentFlags()
 	globalFlags.StringVarP(&logLevel, "log-level", "l", logLevel, "log level (trace, debug, info, warn, error, fatal, panic)")
 	globalFlags.StringVar(&configPath, "config", configPath, "config file path")