feat: Transfer content from docs repository

[mjang]

Proposed changes

We're in the process of transferring most of our doc content to this repository, which will soon be publicly visible. (The remaining doc content is already available in other publicly visible open source repositories.)

This PR transfers that content.

In this PR, we'll test the build, to make sure what we see here is identical to what we see in our current internal repository.

After this PR is merged, I'll next address an internal issue where we'll "anonymize" the commits and committers to this repository. I'll then include an explanation of what we've done in the CONTRIBUTING.md file.

For the record, I cannot sign the F5 Contributor License Agreement until after we open this repository to the public. So that job will fail, and that's acceptable.

I've confirmed that the build works "locally" per the make commands described in the CONTRIBUTING_DOCS.md file.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the contributing guidelines.

• I have signed the F5 Contributor License Agreement (CLA).

• If applicable, I have added tests that prove my fix is effective or that my feature works.

• If applicable, I have checked that any relevant tests pass after adding my changes.

• I have updated any relevant documentation, such as (README.md and CHANGELOG.md).

• I have rebased my branch onto main

• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

• If the change involves:

  • Code
  • Anything that resembles Personally identifying information (PII)
    • Make sure to use placeholders such as <username> in place of PII
  • URLs (watch for typosquatting)
  • Significant new/revised content

  In these cases, the change will require at least two (2) approvals before merging.