Integration of latest docs change requests and Readme.md cleanup

[rotycenh]

Purpose

Update to the docs content:

• Lab title updated to "Java and AI"
• integrating Asir's latest change requests removing any remaining unnecessary "microservices" references.
• Updating the main Readme.md file removing outdated information and pointing the reader to the Jekyll site.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Documentation content changes
[ ] Other... Please describe:

How to Test

Updated readme.md file can be viewed here.

Other updates to the Jekyll docs can be reviewed on the preview site I've created: https://ronline-java-aca-preview.azurewebsites.net/

What to Check

Verify that the expected updates are in place and acceptable.