ci: add manual HiLink URLLC build workflow

.gitea/workflows/build-hilink.yml

@@ -0,0 +1,53 @@
+name: Build HiLink URLLC firmware
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: debian-docker
+    timeout-minutes: 360
+    env:
+      DEVICE: ssc338q_fpv_openipc-urllc-aio
+      BR2_DL_DIR: /tmp/builder-dl
+
+    steps:
+      - name: Checkout builder branch
+        uses: actions/checkout@v4
+
+      - name: Install Buildroot host dependencies
+        shell: bash
+        run: |
+          set -eux
+          apt-get update
+          DEBIAN_FRONTEND=noninteractive apt-get install -y \
+            bash bc bison build-essential ccache cpio curl file flex gawk git \
+            gzip libncurses-dev make patch perl python3 rsync sed tar tree \
+            unzip wget xz-utils
+
+      - name: Build exactly the HiLink URLLC profile
+        shell: bash
+        run: |
+          set -euo pipefail
+          export GIT_HASH="$(git rev-parse --short HEAD)"
+          export GIT_BRANCH="$(git branch --show-current)"
+          mkdir -p "$BR2_DL_DIR" /tmp/ccache
+          ln -s /tmp/ccache "$HOME/.ccache"
+
+          bash builder.sh "$DEVICE"
+
+          mkdir -p dist
+          firmware=$(find openipc/output/images -type f -name 'openipc*nor*.tgz' -print -quit)
+          test -n "$firmware"
+          cp "$firmware" "dist/${DEVICE}-nor.tgz"
+          sha256sum "dist/${DEVICE}-nor.tgz" > "dist/${DEVICE}-nor.tgz.sha256"
+
+          find dist -maxdepth 1 -type f -printf '%f %s bytes\n'
+          cat "dist/${DEVICE}-nor.tgz.sha256"
+
+      - name: Upload firmware artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: hilink-urllc-${{ github.sha }}
+          retention-days: 30
+          path: dist/*