add: add get_features and get_timezones requests support

[ozgen]

What

• Add get_features request support
• Add get_timezones request support
• Add tests for request generation

Why

• Allow python-gvm clients to use the new get_features and get_timezones GMP commands

References

GEA-2083

Checklist

• I have added tests for the changes

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Snapshot Warnings

⚠️: No snapshots were found for the head SHA 3636248.

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Scanned Files

None

[github-actions]

Conventional Commits Report

Type	Number
Added	1

🚀 Conventional commits found.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.40%. Comparing base (cc8d3c7) to head (3636248).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1386   +/-   ##
=======================================
  Coverage   98.39%   98.40%           
=======================================
  Files         104      106    +2     
  Lines        6870     6886   +16     
  Branches     1244     1244           
=======================================
+ Hits         6760     6776   +16     
  Misses         77       77           
  Partials       33       33           

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