* Add contributing doc straight from wiki
* Move sample page creation to contributing guide
* Redirect to wiki page for sample page details
* Add SVG dependency and example page
* Fix radio buttons link
## Description
A lot of the older modules still hardcode targeting older Windows SDK versions. If you're setting up a new dev machine and follow our current guidance (aka using the RNW dependency script) you won't have the older SDKs needed to build Gallery.
We've partially addressed this with some minor patch files in this repo, (which set the modules to use newer SDK versions), but this PR updates the patches in a more future-proof way so the libraries are all building on the same Windows SDK that RNW and the app are using.
### Why
I wanted to contribute to RN Gallery on my new dev machine, and I didn't want to have to install the older SDKs.
### What
See above.
## Screenshots
N/A
* bump to .72
* patch CMs
* try specifying node version
* fix CI
* bump node in azure-pipeline
* patch sketch-canvas to Win2D1.26.0
* try with smaller patch
* add back in assets
* add workaround for webView jest tests
* fix warnings
* remove flyout/popout test and yarn lint
* fix image tag
* address feedback
* remove extra patch information