feat: Adding slog support and handlers

[NucleoFusion]

Adding support for log/slog with flag based checking on output format or verbosity.

Changes

• Added Slog level based logging
  • By Default only WARN and ERROR levels will be shown.
  • On adding the --verbose flag shows INFO and DEBUG level as well.
• Removed dependency on cobra on handling errors, now logged via slog
• lipgloss based formatting for levels

EDIT

Changes

• No logs show for non-verbose
• Modified styles
• Flag logging in PersistentPreRunE

Added better formatting and color codes

[codecov]

Codecov Report

❌ Patch coverage is 0% with 70 lines in your changes missing coverage. Please review.
✅ Project coverage is 7.42%. Comparing base (60ad0bd) to head (356aa5f).
⚠️ Report is 111 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/logger/handler.go	0.00%	53 Missing ⚠️
pkg/logger/logger.go	0.00%	11 Missing ⚠️
cmd/harbor/root/cmd.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             main    #722      +/-   ##
=========================================
- Coverage   10.99%   7.42%   -3.57%     
=========================================
  Files         173     263      +90     
  Lines        8671   13083    +4412     
=========================================
+ Hits          953     972      +19     
- Misses       7612   12002    +4390     
- Partials      106     109       +3     

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[NucleoFusion]

@bupd Did the stuff we discussed in the meet
Its under the EDIT section in the PR description