bug+feat: typo in Makefile and Better error handling

1. Fix the typo in Makefile.
2. Error messages should include the command context, output, and actionable suggestions for the user.
If an executable is missing, a clear message should shown.
When a command fails, the user should prompted to check command syntax and environment setup.

Start by checking the Makefile for the reported typo, then inspect the CLI command execution and error-handling paths. Done means the typo is corrected and failures report command context, output, actionable syntax and environment guidance, plus a clear message when an executable is missing.

Written by the indexing model from the issue text.