TSDK-733 Add template.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,29 @@
+## Purpose
+
+## Approach
+
+## Testing
+
+## Tickets
+*
+
+
+**Delete everything after and including this line after you are done reading and understand what to put for each section**
+
+>### Purpose
+>
+>*State in plain words what the scope of the pull request and what problem it is trying to solve*
+>
+>### Approach
+>
+>*Enumerate the steps you took to create the code/changes contained in this pull request*
+>
+>### Testing
+>
+>*Specify all unit, integration, or end-to-end testing that is contained in this pull request*
+>
+>### Tickets
+>
+>*List tickets if any that are connected to this pull request in the following format:*
+>
+>_* closes #1234_