Simplify domain_list and look_up for user and code base

[RayStick]

Closes #199

References #184

Checklist for the author of this PR:

• [if package files were edited] I have run these checks locally:
  • devtools::document() to generates the .Rd files from any updated roxygen comments.
  • lintr::lint_package(path = ".") to check for style compliance and syntax issues.
  • codemetar::write_codemeta() to ensures the metadata file is up to date.
  • devtools::check() for a comprehensive package check. I have resolved any warnings or errors, or written them here in the PR, for discussion.
• The code base and the documentation files match (they both reflect any recent changes).
• The title of this PR is clear and self-explantory.
• I have added any appropriate labels to this PR.
• This PR is now ready for review (and I have removed the draft PR status).

[codecov]

Codecov Report

Attention: Patch coverage is 96.07843% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
R/metadata_map.R	71.42%	2 Missing ⚠️

Files with missing lines	Coverage Δ
R/inputs_collect.R	98.78% <100.00%> (+4.49%)	⬆️
R/map_compare.R	100.00% <100.00%> (+2.19%)	⬆️
R/plotting.R	100.00% <ø> (ø)
R/user_interactions.R	100.00% <100.00%> (ø)
R/metadata_map.R	74.25% <71.42%> (+1.31%)	⬆️