Auto assign to project workflow (#4863)

* Auto assign to project workflow

* Remove redundant newline

* Update indentation in auto-assign-to-project.yml

Co-authored-by: Eric Cornelissen <ericornelissen@gmail.com>

.github/workflows/auto-assign-to-project.yml

@@ -0,0 +1,25 @@
+name: Auto Assign to Project(s)
+
+on:
+  pull_request_target:
+    types: [opened, labeled]
+env:
+  MY_GITHUB_TOKEN: ${{ secrets.AUTO_ASSIGN_WORKFLOW_TOKEN }}
+
+jobs:
+  assign-to-project:
+    runs-on: ubuntu-latest
+    name: Assign to Project
+    steps:
+      - name: Assign pull requests to "Unprioritised"
+        uses: srggrs/assign-one-project-github-action@1.2.0
+        if: github.event.action == 'opened'
+        with:
+          project: https://github.com/orgs/simple-icons/projects/2
+          column_name: Unprioritised
+      - name: Assign `icon outdated` pull requests to "Priority 1"
+        uses: srggrs/assign-one-project-github-action@1.2.0
+        if: contains(github.event.pull_request.labels.*.name, 'icon outdated')
+        with:
+          project: https://github.com/orgs/simple-icons/projects/2
+          column_name: Priority 1