docs/learning/demo_hp_analog_meets_ai: Add documentation for demo

[BCapota]

Add cod for demo description, list of the capabilites of the system, requiresd hardwrae and configuring the SD card for ADRV9009-ZU11EG demo with Nvidia IGX and software description demo.

Type

• Documentation
• Bug fix
• New feature
• Continuous integration

Checklist

• I have performed a self-review of changes
• I have followed the guidelines:
  • https://analogdevicesinc.github.io/documentation/contributing/docs_guidelines.html
  • https://analogdevicesinc.github.io/doctools/docs_guidelines/index.html
  • https://analogdevicesinc.github.io/documentation/contributing/creating_new_pages.html#documentation-structure
• I have used the appropriate roles and directives:
  • https://analogdevicesinc.github.io/doctools/docs_guidelines/roles.html
  • https://analogdevicesinc.github.io/doctools/docs_guidelines/directives.html
• I ensured that binary data was committed to git lfs:
  • https://analogdevicesinc.github.io/documentation/contributing/creating_new_pages.html#adding-images-and-other-binary-files
• I have built the pages I edited or created, using either make html or adoc serve:
  • https://analogdevicesinc.github.io/doctools/cli.html#serve
• I have signed-off my commits and believe my contribution improves the repository.

[StancaPop]

Could you wrap the text to fit into a maximum of 80 characters/line?

[StancaPop]

This comment is valid for more paragraphs, if applicable.

[gastmaier]

Hi, you added

... 2 files that should have been pointers, but weren't:
        docs/learning/demo_hp_analog_meets_ai/capture_frequency.jpg
        docs/learning/demo_hp_analog_meets_ai/capture_time.jpg

I fixed for you, but please read
https://analogdevicesinc.github.io/documentation/contributing/forking_publishing.html#conquer-git-lfs

We use git lfs to ensure this repository is lean in the long term.
The whole documentation weights 10mb by deferring binary files to the git lfs server.
If the instructions are followed, the git clone doesn't take more than 2 seconds, and adoc serve fetches the binaries on demand as you need them.

When merging, please squash to wipe the directed committed binary files from the history.

Other changes:
use of cross reference external, git role, formatting