Add support for PR and Issue templates to QMK_firmware GitHub (#4491)

* Add support document

* Add Bug Report

* Add GitHub Pull Request Template

* Feature request issue template

* Touch up feature request template

* Add 'other issues' template

* move support doc

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,15 @@
+---
+name: Feature request
+about: Suggest a new feature or changes to existing features 
+
+---
+
+## Feature Request Type
+
+- [ ] Core Functionality
+- [ ] Add-on hardware support (eg audio, rgb, oled screen, etc)
+- [ ] Alteration (enhancement/optimization) of existing Feature(s)
+- [ ] New behavior
+
+## Description 
+A few sentances describing what it is that you'd like to see. Additional information (such as links to spec sheets, licensing info, other related issues or PR's, etc) would be helpful.