add files for repo to match nest style

[ayogasekaram]

add files and workflows to match NEST repo style

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Pre-review Checklist (if item does not apply, mark is as complete)

• All GitHub Action workflows pass with a ✅
• PR branch has pulled the most recent updates from master branch: usethis::pr_merge_main()
• If a bug was fixed, a unit test was added.
• Code coverage is suitable for any new functions/features (generally, 100% coverage for new code): devtools::test_coverage()
• Request a reviewer

Reviewer Checklist (if item does not apply, mark is as complete)

• If a bug was fixed, a unit test was added.
• Run pkgdown::build_site(). Check the R console for errors, and review the rendered website.
• Code coverage is suitable for any new functions/features: devtools::test_coverage()

When the branch is ready to be merged:

• Update NEWS.md with the changes from this pull request under the heading "# cards (development version)". If there is an issue associated with the pull request, reference it in parentheses at the end update (see NEWS.md for examples).
• All GitHub Action workflows pass with a ✅
• Approve Pull Request
• Merge the PR. Please use "Squash and merge" or "Rebase and merge".

[github-actions]

Code Coverage Summary

Filename                     Stmts    Miss  Cover    Missing
-------------------------  -------  ------  -------  ---------
R/tbl_demographics.R            34      34  0.00%    44-79
R/theme_gtsummary_roche.R       13      13  0.00%    22-40
TOTAL                           47      47  0.00%

Diff against main

Filename      Stmts    Miss  Cover
----------  -------  ------  --------
TOTAL             0       0  +100.00%

Results for commit: d06c430

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results

[edelarua]

Lgtm! One grammar suggestion but otherwise should be good to go once you resolve the dependency checks. Thanks Abi!!

[edelarua]

Let me know if you add more and need another review! :)

[ayogasekaram]

I have read the CLA Document and I hereby sign the CLA

[cicdguy]

recheck

[github-actions]

✅ All contributors have signed the CLA
_{Posted by the CLA Assistant Lite bot.}