refactor: add PrettyPrinter to print backup progress

[mlycore]

Type of change:

• Bugfix
• New feature provided
• Improve performance
• Backport patches
• Refactor

What this PR does / why we need it:

• Abstract a PrettyPrinter to print progress

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov-commenter]

Codecov Report

❌ Patch coverage is 53.19149% with 44 lines in your changes missing coverage. Please review.
✅ Project coverage is 36.49%. Comparing base (3604a24) to head (f64ab8e).
⚠️ Report is 257 commits behind head on main.

Files with missing lines	Patch %	Lines
pitr/cli/pkg/prettyoutput/progress.go	8.51%	43 Missing ⚠️
pitr/cli/internal/cmd/backup.go	97.87%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #470      +/-   ##
==========================================
- Coverage   39.71%   36.49%   -3.23%     
==========================================
  Files          51       60       +9     
  Lines        6083     6837     +754     
==========================================
+ Hits         2416     2495      +79     
- Misses       3448     4099     +651     
- Partials      219      243      +24     

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