Add linters and fix linting issues

[RasmusSkytte]

Intent

This PR adds the linters developed for diseasystore and creates a new linter that checks for correct formatting of @param and @field roxygen tags.

Approach

The functions from diseasystore were copied over.

The linter for @param and @field tags looks for lines with these, and ensures they contain back ticks ` and carriage returns.
This is the proxy used to check it adheres to the MLR3 documentation templates.

Finally, the lints the new linters finds are resolved

Known issues

Lintr fails for quick-start.Rmd. This is due to the vignette not being written yet and is outside the scope of this PR.

Document workflow fails currently, but this is being fixed elsewhere (AEF-DDF/)
Documentation is updated -- the workflow fails for other reasons.

Checklist

• The PR passes all local unit tests
• I have documented any new features introduced
• If the PR adds a new feature, please add an entry in NEWS.md
• A reviewer is assigned to this PR

[codecov]

Codecov Report

Attention: 12 lines in your changes are missing coverage. Please review.

Comparison is base (8517a83) 83.98% compared to head (cb9fdaa) 86.77%.
Report is 23 commits behind head on main.

Files	Patch %	Lines
R/DiseasyActivity.R	25.00%	9 Missing ⚠️
R/0_linters.R	96.20%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #78      +/-   ##
==========================================
+ Coverage   83.98%   86.77%   +2.79%     
==========================================
  Files           8        8              
  Lines         843      885      +42     
==========================================
+ Hits          708      768      +60     
+ Misses        135      117      -18     

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