Add auto-assign PR author workflow (#1983)

## Description:

Adds a GitHub Action to automatically assign a PR author when they
create the author.
This PR tests itself.

replaces #1822 

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

loymdayddaud

Co-authored-by: TheGiraffe3 <TheGiraffe3@users.noreply.github.com>

.github/workflows/pr-author.yml

@@ -0,0 +1,18 @@
+name: 🧼 PR
+
+on:
+  pull_request:
+    types:
+      - edited
+      - opened
+
+permissions:
+  pull-requests: write
+
+jobs:
+  auto-assign:
+    name: Auto-assign author
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: toshimaru/auto-author-assign@7e15cd70c245ad136377c3fab3479815df10d844