build: Auto-add issues to Arch-BOM's project

As maintainers, we've been missing some issues that have been filed against
the repo. Hopefully this will fix that.

Ticket: edx/edx-arch-experiments#368

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

@@ -0,0 +1,16 @@
+name: Add new issues to appropriate GitHub Projects
+
+on:
+  issues:
+    types:
+      - opened
+
+jobs:
+  add_to_arch_bom_board:
+    uses: openedx/.github/.github/workflows/add-issue-to-a-project.yml@master
+    secrets:
+      GITHUB_APP_ID: ${{ secrets.GRAPHQL_AUTH_APP_ID }}
+      GITHUB_APP_PRIVATE_KEY: ${{ secrets.GRAPHQL_AUTH_APP_PEM }}
+    with:
+      ORGANIZATION: edx
+      PROJECT_NUMBER: 11