chore: add new issues to Keyman project automatically

Relates-to: keymanapp/keyman.com#505

Author: mcdurdin

.github/workflows/add-to-keyman-project.yml

@@ -0,0 +1,19 @@
+name: Add new issues and pull requests to projects
+
+on:
+  pull_request:
+    types:
+      - opened
+  issues:
+    types:
+      - opened
+
+jobs:
+  add-to-project:
+    name: Add new issues and pull requests to project
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/add-to-project@v1.0.2
+        with:
+          project-url: https://github.com/orgs/keymanapp/projects/1
+          github-token: ${{ secrets.ADD_TO_PROJECT_PAT }}