Planner Addon

[Innders]

Very initial Planner Addon docs, it should be put out as a work in progress so testers have some documentation.

The next version of this page will include images/gifs.

[MustafaJafar]

Great work!
I've few comments/suggestions if you don't mind.

Additionaly:

1. Could we add more visuals.
2. Do we want to add a feature card similar to this one? we can skip adding code link.

[Innders]

1. Could we add more visuals.

This will come at a later date, it's better to have something than nothing. Feel free to create some visuals yourself if you get some free time!

[MustafaJafar]

This will come at a later date, it's better to have something than nothing. Feel free to create some visuals yourself if you get some free time!

I think having one image at the top is fair enough. to help users imagine/expect how the planner looks like.
Maybe something like: (stolen from our discussions on GH)

[Innders]

@MustafaJafar I've added some basic images, I would like to add some gifs in the future.

[MustafaJafar]

Looking Good!