chore: add pull request template

Added a pull request template to standardize submissions.

Author: PAMulligan

.github/pull_request_template.md

@@ -0,0 +1,23 @@
+## Description
+
+<!-- Describe your changes in detail -->
+
+## Related Issue
+
+<!-- Link to the issue this PR addresses, e.g. Closes #123 -->
+
+## Type of Change
+
+- [ ] Bug fix (non-breaking change that fixes an issue)
+- [ ] - [ ] New feature (non-breaking change that adds functionality)
+- [ ] - [ ] Documentation update
+- [ ] - [ ] Chore (dependency updates, CI changes, refactoring)
+- [ ] - [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+
+- [ ] ## Checklist
+
+- [ ] - [ ] Tests pass (`pnpm test` in both widget/ and worker/)
+- [ ] - [ ] Linting passes (`pnpm eslint .`)
+- [ ] - [ ] Types check (`pnpm tsc --noEmit`)
+- [ ] - [ ] Widget builds successfully (`cd widget && pnpm build`)
+- [ ] - [ ] Documentation updated (if applicable)