Add FAQ to docs

[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

Adds a FAQ section to the docs.

[denniskigen]

Looks great! Thanks, @brandones!

[github-actions]

File size impact

Merging doc-faq into master impact files as follow:

@openmrs/esm-devtools-app (no impact)

Files	new size
Unmodified (5)	341 kB (0 B / +0%)	👻
Total (5)	341 kB (0 B / +0%)	👻

@openmrs/esm-implementer-tools-app (no impact)

Files	new size
Unmodified (17)	1.6 MB (0 B / +0%)	👻
Total (17)	1.6 MB (0 B / +0%)	👻

@openmrs/esm-login-app (no impact)

Files	new size
Unmodified (28)	1.92 MB (0 B / +0%)	👻
Total (28)	1.92 MB (0 B / +0%)	👻

@openmrs/esm-offline-tools-app (no impact)

Files	new size
Unmodified (23)	2.39 MB (0 B / +0%)	👻
Total (23)	2.39 MB (0 B / +0%)	👻

@openmrs/esm-primary-navigation-app (no impact)

Files	new size
Unmodified (18)	2.05 MB (0 B / +0%)	👻
Total (18)	2.05 MB (0 B / +0%)	👻

@openmrs/esm-app-shell (no impact)

Files	new size
Unmodified (4)	1.73 MB (0 B / +0%)	👻
Total (4)	1.73 MB (0 B / +0%)	👻

_{Generated by @jsenv/file-size-impact during Report bundle size#1813696431 on 0a9ecc0}

[dkayiwa]

@brandones this is very useful 👍