Docs: Add page on createActionGroup

[brandonroberts]

Information

Add a documentation page explaining createActionGroup in NgRx Store and embed the YouTube video about it also.

Documentation page

No response

I would be willing to submit a PR to fix this issue

• [ ] Yes
• [ ] No

[santoshyadavdev]

Can I take this.

[brandonroberts]

Check with @markostanimirovic to be sure he hasn't started it yet

[santoshyadavdev]

Cool @markostanimirovic let me know, if you are already doing it.

[markostanimirovic]

I haven't started it yet. You can take it @santoshyadavdev 🙂

[markostanimirovic]

Here is a list of resources that may be helpful for writing a page about createActionGroup:

• API
• Creating Actions with NgRx Just Got Even Easier
• NgRx Action Group Creator
• The TypeScript Gluten Behind NgRx createActionGroup

I'd put this page named "Action Groups" in the "Advanced" section of the @ngrx/store docs. We can also add a reference to this page on the Actions page.