feat(cli): add advanced command hint to help output

[Kelvinoppong]

Summary

• Adds a hint line at the bottom of azldev --help output: Use "azldev advanced --help" for additional tools (mock, mcp, wget).
• Improves discoverability of the hidden advanced command group without fully unhiding it
• Updates help output snapshots to match

Closes #33

Test plan

• mage unit passes
• mage check all passes
• CI scenario tests pass with updated snapshots

[Kelvinoppong]

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[Kelvinoppong]

@reubeno This PR is ready for review. It adds a hint for the advanced commands to the azldev --help output as requested in #33.

[reubeno]

@Kelvinoppong Thanks for the PR! We appreciate your contribution.

We've unblocked the PR checks and will monitor them.

Edited: looks like a spacing issue in the snapshot files?

[Kelvinoppong]

@reubeno Thanks for reviewing! You're right, there was a trailing whitespace inconsistency in the snapshot files. The root cause was that the original implementation used fmt.Fprintln inside a help function wrapper, which wrote outside cobra's template system. This meant stylishcobra.DisableExtraNewlines() couldn't control the trailing whitespace consistently across environments (local vs CI).

I've fixed this by embedding the hint directly into cobra's usage template via SetUsageTemplate, so DisableExtraNewlines() now handles all trailing whitespace uniformly. The snapshot files have been updated to match. All local tests pass, and the container snapshots have been manually aligned to the same format.

Ready for re-review when you get a chance

[reubeno]

I like the new approach of updating the help template. Changes look good to me; will just be watching PR checks.

[Kelvinoppong]

I like the new approach of updating the help template. Changes look good to me; will just be watching PR checks.

Thanks for the review. All PR checks have passed now. Appreciate you unblocking and keeping an eye on them