Docs: move Fields to own pages

[privatemaker]

First pass attempt at #10 i'm not sure if what I did will satisfy Gatsby, but pushing trigger a build and investigate. This is a WIP

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[martinjagodic]

I am a bit concerned about the length of the sidebar at this point. Maybe I should look into collapsing them?

I am also not sure that we are removing the name Widgets from the docs. I think these should be still called widgets because a Field and a Widget are different concepts.

What about joining them into a subsection like this?

├ Fields
│ └- Widgets
│    ├-- String
│    └-- Text

[privatemaker]

I am a bit concerned about the length of the sidebar at this point.

Yeah, I do get that concern. Perhaps collapsibles are needed now. I think it would honestly be an improvement in general..

I think these should be still called widgets

Yeah, I agree. I'll make that change.

[privatemaker]

I'm not happy with how this is looking at all. I think we should try to keep the buttons of the all the widgets in a list like it currently is:

But refactor it so each widget is a first class page such as Image as opposed to an AJAXy box that is visually constrained.

• Make the main level of details no longer a <ul> list, as it currently is:

With proposed change they are left aligned with normal page text. While the items under Options are the first level <ul> I think this will make things more readable.

The image widget allows editors to upload... 

Name: image
UI: file picker...
Data types: file path string
Options:
 - default: accepts a file path string; defaults to null

• Include a screenshot of each rendered UI widget would be nice.

[martinjagodic]

I agree with all your points.

Navigation: I think we need to put side menu items into accordions. That way other widget links will be visible all the time and we don't need the buttons.

I agree with both of your other points.

I can help with the sidebar and/or screenshots but I have some other tasks that I need to finish first, so it might take some patience.