docs(PULL_REQUEST_TEMPLATE): add PR template

Author: racevedoo

PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,12 @@
+### Description
+Please explain the changes you made here.
+
+### Why is this PR needed?
+Please describe why this PR should be merged here.
+
+### Checklist
+- [ ] Branch is named acoording to standards (`feature/*`, `fix/*`, `hotfix/*`)
+- [ ] Code compiles correctly
+- [ ] Created tests which fail without the change (if possible)
+- [ ] All tests passing
+- [ ] Extended the README / documentation, if necessary