feat: encode selected groups into lockfile

[frostming]

Pull Request Checklist

• A news fragment is added in news/ describing what is new.
• Test cases added for changed code.

Describe what you have changed in this PR.

Resolve #1704

[codecov-commenter]

Codecov Report

Base: 85.23% // Head: 85.36% // Increases project coverage by +0.12% 🎉

Coverage data is based on head (b44b924) compared to base (2f17b59).
Patch coverage: 91.33% of modified lines in pull request are covered.

📣 This organization is not using Codecov’s GitHub App Integration. We recommend you install it so Codecov can continue to function properly for your repositories. Learn more

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1741      +/-   ##
==========================================
+ Coverage   85.23%   85.36%   +0.12%     
==========================================
  Files          92       93       +1     
  Lines        8672     8735      +63     
  Branches     1883     1897      +14     
==========================================
+ Hits         7392     7457      +65     
+ Misses        862      861       -1     
+ Partials      418      417       -1     

Flag	Coverage Δ
unittests	85.18% <91.33%> (+0.13%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/pdm/cli/options.py	94.84% <ø> (ø)
src/pdm/pytest.py	92.69% <0.00%> (+0.04%)	⬆️
src/pdm/cli/actions.py	77.77% <89.47%> (+0.02%)	⬆️
src/pdm/cli/filters.py	92.42% <92.42%> (ø)
src/pdm/cli/commands/add.py	88.88% <100.00%> (+0.65%)	⬆️
src/pdm/cli/commands/export.py	100.00% <100.00%> (ø)
src/pdm/cli/commands/install.py	89.28% <100.00%> (+0.82%)	⬆️
src/pdm/cli/commands/lock.py	100.00% <100.00%> (ø)
src/pdm/cli/commands/remove.py	100.00% <100.00%> (ø)
src/pdm/cli/commands/sync.py	100.00% <100.00%> (ø)
... and 9 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.