FEATURE-66: The app should support grouping

[grafviktor]

• Add group UI input field to host edit form
• Implement group list UI component which is used to selected a particular group

[codecov]

Codecov Report

Attention: Patch coverage is 89.50893% with 47 lines in your changes missing coverage. Please review.

Project coverage is 81.95%. Comparing base (fbc4932) to head (4f2db5d).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
internal/ui/model.go	40.74%	16 Missing ⚠️
internal/ui/component/hostlist/hostlist.go	92.50%	12 Missing and 3 partials ⚠️
internal/ui/component/grouplist/grouplist.go	92.22%	6 Missing and 1 partial ⚠️
internal/model/ssh/config.go	66.66%	2 Missing and 1 partial ⚠️
internal/ui/component/hostlist/host_delegate.go	89.65%	3 Missing ⚠️
internal/ui/component/grouplist/item.go	33.33%	2 Missing ⚠️
internal/ui/component/hostedit/hostedit.go	96.15%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #87      +/-   ##
===========================================
+ Coverage    80.10%   81.95%   +1.84%     
===========================================
  Files           24       27       +3     
  Lines         1674     2000     +326     
===========================================
+ Hits          1341     1639     +298     
- Misses         320      346      +26     
- Partials        13       15       +2     

Flag	Coverage Δ
go-1.22.x	81.95% <89.50%> (+1.84%)	⬆️
go-1.23.x	81.95% <89.50%> (+1.84%)	⬆️
macOS	81.66% <89.50%> (+1.93%)	⬆️
ubuntu	81.66% <89.50%> (+1.93%)	⬆️
unit	81.95% <89.50%> (+1.84%)	⬆️
windows	80.71% <88.61%> (+1.93%)	⬆️

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