PR description check (#766)

## Description:

Adds a PR description checker that enforce that the PR template is being
followed.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Chores**
- Introduced automated validation for pull request descriptions to
ensure required sections and checklist items are completed before
merging.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Scott Anderson <662325+scottanderson@users.noreply.github.com>

.github/workflows/pr-description.yml

@@ -0,0 +1,45 @@
+name: 🧼 PR Description
+
+on:
+  pull_request:
+    types: [opened, edited, synchronize]
+
+permissions: {}
+
+jobs:
+  validate-description:
+    name: Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@v7
+        with:
+          script: |
+            const body = context.payload.pull_request.body || '';
+
+            const errors = [];
+
+            // Check for ## Description section
+            const descMatch = body.match(/^## Description:\s*\n((?:(?!^#).*\n?)*)/m);
+            if (!descMatch || descMatch[1].trim().length < 20) {
+              errors.push('❌ Missing or short `## Description:` section.');
+            }
+
+            // Check all three boxes are checked
+            const requiredBoxes = [
+              /- \[x\] I have added screenshots for all UI updates/i,
+              /- \[x\] I confirm I have thoroughly tested these changes and take full responsibility for any bugs introduced/i,
+              /- \[x\] I understand that submitting code with bugs that could have been caught through manual testing blocks releases and new features for all contributors/i
+            ];
+
+            for (const box of requiredBoxes) {
+              if (!box.test(body)) {
+                errors.push('❌ One or more checklist items are not checked.');
+                break;
+              }
+            }
+
+            if (errors.length > 0) {
+              core.setFailed(errors.join('\n'));
+            } else {
+              console.log('✅ PR description and checklist look good.');
+            }