Added prefix argument to keywords tool

[francescalb]

Also changed previous prefix argument to write-prefixes, as that is what it did

Description

Type of change

• Bug fix and code cleanup
• New feature
• Documentation update
• Testing

Checklist for the reviewer

This checklist should be used as a help for the reviewer.

• Is the change limited to one issue?
• Does this PR close the issue?
• Is the code easy to read and understand?
• Do all new feature have an accompanying new test?
• Has the documentation been updated as necessary?
• Is the code properly tested?

[codecov]

Codecov Report

❌ Patch coverage is 6.66667% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.59%. Comparing base (342c440) to head (390960e).
⚠️ Report is 13 commits behind head on master.

Files with missing lines	Patch %	Lines
tripper/datadoc/keywords.py	6.66%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #492      +/-   ##
==========================================
- Coverage   84.71%   84.59%   -0.13%     
==========================================
  Files          30       30              
  Lines        4789     4796       +7     
==========================================
  Hits         4057     4057              
- Misses        732      739       +7     

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[jesper-friis]

Suggested some changes. Nice implementation of the --prefix argument

[jesper-friis]

Nice :-)

[jesper-friis]

We need to add a # pylint disable=too-many-statements.

See https://github.com/EMMC-ASBL/tripper/actions/runs/21673427410/job/62487043368?pr=492

Otherwise great!