Adds github and asf workflow for docs and adds headers to files

[skrawcz]

See this PR -> https://burr.staged.apache.org/

To publish docs we need to publish via
the ASF preferred mechanism. This hopefully
sets things up.

Adds headers to fall files.
Changes references where needed. E.g. Burr -> Apache Burr; updates domains.

Changes

• adds to .asf
• adds to .github workflows
• updates docs & references.
• adds headers to all files

How I tested this

• via this PR

Notes

TODO:

• update base URL
• add ASF footer
• add ASF links
• update docs for ASF guidelines -- e.g. Apache Burr vs Burr
• remove / fix video on front page due to not allowing images from other

Checklist

• PR has an informative and human-readable title (this will be pulled into the release notes)
• Changes are limited to a single goal (no scope creep)
• Code passed the pre-commit check & code is left cleaner/nicer than when first encountered.
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future TODOs are captured in comments
• Project documentation has been updated if adding/changing functionality.

[github-actions]

A preview of 9fd63c4 is uploaded and can be seen here:

✨ https://burr.dagworks.io/pull/577 ✨

Changes may take a few minutes to propagate. Since this is a preview of production, content with draft: true will not be rendered. The source is here: https://github.com/apache/burr/tree/gh-pages/pull/577/