Add new command to delete selected backup increments safely

[nagyesta]

Issue: #190

Description

• Adds new command to delete selected backup increments
• Implements parser and properties for the new command
• Moves increment deletion logic to ManifestManager to make it reusable
• Implements new controller to take care of increment deletions
• Adds new tests
• Updates documentation

Entry point

Checklists

• I have rebased my branch
• My commit message is meaningful
• The commit messages use semantic versioning: {major}, {minor} or {patch}
• The changes are focusing on the issue at hand
• I have maintained or increased test coverage

Notes

[codecov]

Codecov Report

Attention: Patch coverage is 86.53846% with 14 lines in your changes are missing coverage. Please review.

Project coverage is 92.06%. Comparing base (e42635e) to head (cbce604).
Report is 1 commits behind head on main.

Files	Patch %	Lines
...esta/filebarj/core/common/ManifestManagerImpl.java	78.94%	8 Missing ⚠️
...ebarj/core/delete/IncrementDeletionController.java	72.72%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #244      +/-   ##
============================================
+ Coverage     91.96%   92.06%   +0.09%     
- Complexity     1123     1145      +22     
============================================
  Files            96       98       +2     
  Lines          3661     3728      +67     
  Branches        251      257       +6     
============================================
+ Hits           3367     3432      +65     
- Misses          214      215       +1     
- Partials         80       81       +1     

Flag	Coverage Δ
core	90.68% <77.04%> (+0.02%)	⬆️
job	97.02% <100.00%> (+0.23%)	⬆️
stream	92.16% <ø> (ø)

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