Add initial package functions

[pratikunterwegs]

This draft PR adds some initial functions taken from https://github.com/vimc/montagu-reports/pull/1312.

[github-actions]

This pull request:

• Adds 28 new dependencies (direct and indirect)
• Adds 3 new system dependencies
• Removes 0 existing dependencies (direct and indirect)
• Removes 0 existing system dependencies

Reach out on slack (#code-review or #help channels) to double check if there are base R alternatives to the new dependencies.

(Note that results may be inaccurate if you branched from an outdated version of the target branch.)