docs: add documentation for grid features on Wiki

[mackelito]

Bug Report

"You do not have permission to update this wiki."
https://github.com/angular/flex-layout/wiki/gdAlignColumns-API

Same for more or less all links to Grid content :)

What is the expected behavior?

Should work ;)

What is the current behavior?

nope..

[CaerusKaru]

This is a very important docs issue, one that @ThomasBurleson and I hope to resolve soon. We have a plan for an entirely new approach to docs, and an independent docs site, which is why I'm hesitant to commit to filling in the gaps right now. If we don't have a concrete plan in place by the end of the month, I'll add the missing docs.

Or, if someone would like to add them, PRs are always welcome!

[mainawycliffe]

Is this taken? I would like to take it up if its not taken

[CaerusKaru]

@mainawycliffe It's all yours! If you open a PR I'll review it and then update the Wiki accordingly.

[takahser]

@CaerusKaru @mainawycliffe The original plan to publish the grid docs by the end of March apparently didn't work out. What's the current state on this issue?