Create a data_parser plugin (a la Migrate Plus)

MR is ready for review.

• Adds an Ai data_parser plugin that utilizes our AiMigrator service.
• Adds a test migration yml for an example slice of urls.
• Adds an additional config file for our sample content type. It is necessary for loading the content type during tests.
• Updates AiMigrator so that convert() takes url, html, or both. Improves Ai prompt.
• Updates the hard-coded bundle structure for AiMigrator so that it resembles an actual Drupal bundle and can be migrated easily.
• Updates tests.

dmundra → credited swirt → .

Ran into some bugs trying to enable the example module after re-doing my local site.

Sry about that @dmundra. There was a extraneous field storage config I had added to address a test that I later removed. I think I've resolved the issue now.

Yes, a good test command is ddev drush mim slice1.

Thank you!

No worries @majorrobot. Reviewing now

@majorrobot migration working well. Noticed that the example content-type didn't display fields on node view or edit so after enabling those I can see the values. I will share comparing AI response with what is being migrated.

For the HTML and other content type issues that can be handled in future issues like <#3539369>

dmundra → credited davidmpickett → .

dmundra → credited kducharm → .

dmundra → credited timozura → .

dmundra → credited webbywe → .

We mob-programmed on this PR so credited all the folks. Thank you!

Thx to everyone who mobbed and helped us resolve issues.

@dmundra, I've committed all of the suggestions. This is ready to go again.

Looking good @majorrobot. Approved and merged.