Squashed 'external/imgui/imgui/' content from commit d4ddc46e7

git-subtree-dir: external/imgui/imgui
git-subtree-split: d4ddc46e7773e9a9b68f965d007968f35ca4e09a

.github/workflows/scheduled.yml

@@ -0,0 +1,15 @@
+#
+# This is a dummy workflow used to trigger scheduled builds. Forked repositories most likely should disable this
+# workflow to avoid daily builds of inactive repositories.
+#
+name: scheduled
+
+on:
+  schedule:
+    - cron:  '0 9 * * *'
+
+jobs:
+  scheduled:
+    runs-on: ubuntu-latest
+    steps:
+      - run: exit 0