chore: add more robust pr template

Author: CharlieC3

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,63 @@
+Use the following template to create your pull request
+
+## Description
+
+Describe the changes that where made in this pull request. When possible start with a user story - short, simple descriptions of a feature told from the perspective of the person who desires the new capability. Be sure to also include the following information:
+
+1. Motivation for change
+2. What was changed
+3. How does this impact application developers
+4. Link to relevant issues and documentation
+5. Provide examples of use cases with code samples and applicable acceptance criteria
+
+Example:
+As a Blockstack developer, I would like to encrypt files using the app private key. This is needed because storing unencrypted files is unacceptable. This pull request adds the `encryptContent` function which will take a string and encrypt it using the app private key.
+
+```
+encryptContent('my data')
+
+// Running the above should result in the following encrypted data object
+{"iv":"c91...","ephemeralPK":"031...","cipherText":"d61...","mac":"e73..."}
+```
+
+For details refer to issue #123
+
+## Type of Change
+- [ ] New feature
+- [ ] Bug fix
+- [ ] API reference/documentation update
+- [ ] Other
+
+## Does this introduce a breaking change?
+List the APIs or describe the functionality that this PR breaks.
+Workarounds for or expected timeline for deprecation
+
+## Are documentation updates required?
+<!-- 
+  DOCUMENTATION
+  Consider if this PR makes changes that require documentation updates:
+    - API changes
+    - Renamed methods
+    - Change in instructions inside tutorials/guides
+    - etc...
+
+   The best way to find these is by searching inside the docs at https://github.com/blockstack/docs
+-->
+- [ ] Link to documentation updates: 
+
+## Testing information
+
+Provide context on how tests should be performed.
+
+1. Is testing required for this change?
+2. If it’s a bug fix, list steps to reproduce the bug
+3. Briefly mention affected code paths
+4. List other affected projects if possible
+5. Things to watch out for when testing
+
+## Checklist
+- [ ] Code is commented where needed
+- [ ] Unit test coverage for new or modified code paths
+- [ ] `npm run test` passes
+- [ ] Changelog is updated
+- [ ] Tag 1 of @kyranjamie or @zone117x for review