fix(cli): avoid duplicate error output in ExitNicelyOnError

[isha822]

Summary

This PR resolves an issue where the mindev CLI outputs duplicated error messages upon command failure. Previously, the ExitNicelyOnError utility printed identical strings for both the Message and Details fields. Additionally, the Cobra framework's default error handling printed the raw error before the custom formatter executed, creating redundant terminal output.

Changes introduced:

• Added a validation guard in internal/util/cli/cli.go to only print Details if the string differs from Message.
• Configured SilenceErrors: true in the root command (cmd/dev/app/root.go) to prevent Cobra from redundantly printing the error, deferring entirely to the custom CLI formatter.

Dependencies: None

Testing

Changes were verified locally via manual CLI execution and existing unit tests.

Steps to reproduce:

1. Build the local developer CLI: go build -o bin/mindev ./cmd/dev
2. Trigger a standard file omission error: ./bin/mindev ruletype lint -r fake.yaml

Output Verification:
The CLI now outputs a single Message and Details block without the preceding Error: from Cobra or duplicated detail lines.

Before:

Error: error expanding file args: error getting file info: stat fake.yaml: no such file or directory
Message: Error on execute
Details: error expanding file args: error getting file info: stat fake.yaml: no such file or directory

After:

Message: Error on execute
Details: error expanding file args: error getting file info: stat fake.yaml: no such file or directory

Unit Tests:

• go test ./internal/util/cli/... - PASS

[CLAassistant]

All committers have signed the CLA.

[evankanderson]

Thanks for your contribution (sorry, it got stuck behind a bunch of other PRs while I was on vacation). You'll need to sign the CLA to grant OpenSSF permissions to use your contributions before this can be merged.

[coveralls]

coverage: 59.542% (+0.003%) from 59.539% — isha822:fix-cli-error-stutter into mindersec:main

[isha822]

Thanks for the review! @evankanderson I've just signed the CLA. Let me know if there is anything else needed from my end to get this merged