Add CI workflow to verify UKL build and boot

.github/workflows/test.yaml

@@ -0,0 +1,25 @@
+name: "Test that UKL is still working"
+on:
+  workflow_dispatch:
+  push:
+  pull_request:
+
+jobs:
+  verify:
+    runs-on: "ubuntu-latest"
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          apt install -y bc binutils bison dwarves flex gcc git gnupg2 gzip libelf-dev libncurses5-dev libssl-dev make openssl pahole perl-base rsync tar xz-utils
+          apt install -y docker automake autoconf qemu
+
+      - name: Build
+        run: |
+          make -j`nproc`
+          make boot
+          exit $?
+
+