(docs) Add support for module categories; remove cruft

[brandones]

Requirements

• This PR has a title that briefly describes the work done, including the ticket number if there is a ticket.

For changes to apps

• My work conforms to the OpenMRS 3.0 Styleguide.

If applicable

• My work includes tests, or is validated by existing tests.
• I have updated the esm-framework mock to reflect any API changes I have made.

Summary

Improves some things about the API docs.

Also removes an old workspace function. It didn't do anything.

[github-actions]

File size impact

Merging docs-api into master impact files as follow:

@openmrs/esm-devtools-app (-0.08%)

Files	new size
packages/apps/esm-devtools-app/dist/217.js	322 kB (-276 B / -0.09%)	↘️
Unmodified (4)	25.2 kB (0 B / +0%)	👻
Total (5)	347 kB (-276 B / -0.08%)	↘️

@openmrs/esm-implementer-tools-app (-0.02%)

Files	new size
packages/apps/esm-implementer-tools-app/dist/217.js	322 kB (-276 B / -0.09%)	↘️
Unmodified (16)	1.29 MB (0 B / +0%)	👻
Total (17)	1.61 MB (-276 B / -0.02%)	↘️

@openmrs/esm-login-app (-0.01%)

Files	new size
packages/apps/esm-login-app/dist/217.js	322 kB (-276 B / -0.09%)	↘️
Unmodified (27)	1.61 MB (0 B / +0%)	👻
Total (28)	1.93 MB (-276 B / -0.01%)	↘️

@openmrs/esm-offline-tools-app (-0.01%)

Files	new size
packages/apps/esm-offline-tools-app/dist/217.js	322 kB (-276 B / -0.09%)	↘️
Unmodified (25)	2.37 MB (0 B / +0%)	👻
Total (26)	2.69 MB (-276 B / -0.01%)	↘️

@openmrs/esm-primary-navigation-app (-0.01%)

Files	new size
packages/apps/esm-primary-navigation-app/dist/217.js	322 kB (-276 B / -0.09%)	↘️
Unmodified (17)	1.74 MB (0 B / +0%)	👻
Total (18)	2.06 MB (-276 B / -0.01%)	↘️

@openmrs/esm-app-shell (-0.02%)

Files	new size
packages/shell/esm-app-shell/dist/openmrs.js	1.33 MB (-322 B / -0.02%)	↘️
packages/shell/esm-app-shell/dist/service-worker.js	163 kB (0 B / +0%)	👻
Unmodified (2)	538 kB (0 B / +0%)	👻
Total (4)	2.03 MB (-322 B / -0.02%)	↘️

_{Generated by @jsenv/file-size-impact during Report bundle size#1857385782 on a35c6ea}

[denniskigen]

Excellent. LGTM!