[CI] use ZMK's action

.gitea/workflows/build.yml

@@ -1,56 +1,7 @@
-on: [push, pull_request, workflow_dispatch]
 
 name: Build
-
+on: [push, pull_request, workflow_dispatch]
-env:
-  ACTIONS_STEP_DEBUG: true
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    uses: zmkfirmware/zmk/.github/workflows/build-user-config.yml@main
-    container:
-      image: zmkfirmware/zmk-build-arm:stable
-    name: Build
-    steps:
-      - name: Install Dependencies
-        run: |
-          apt-get update;
-          apt-get install --yes --no-install-recommends nodejs ssh zip
-
-      - name: Checkout
-        uses: actions/checkout@v3
-
-      - name: West Init
-        run: west init -l config
-
-      - name: West Update
-        run: west update
-
-      - name: West Zephyr export
-        run: west zephyr-export
-
-      - name: West Build (Corne Left)
-        run: west build -s zmk/app -b nice_nano_v2 -- -DSHIELD=corne_left -DZMK_CONFIG="${GITHUB_WORKSPACE}/config"
-
-      - name: Corne Left Kconfig file
-        run: cat build/zephyr/.config | grep -v "^#" | grep -v "^$"
-
-      - name: Rename zmk.uf2
-        run: cp build/zephyr/zmk.uf2 corne_left_nice_nano_v2.uf2
-
-      - name: West Build (Corne Right)
-        run: west build --pristine -s zmk/app -b nice_nano_v2 -- -DSHIELD=corne_right -DZMK_CONFIG="${GITHUB_WORKSPACE}/config"
-
-      - name: Corne Right Kconfig file
-        run: cat build/zephyr/.config | grep -v "^#" | grep -v "^$"
-
-      - name: Rename zmk.uf2
-        run: cp build/zephyr/zmk.uf2 corne_right_nice_nano_v2.uf2
-
-      - name: Upload Artifacts
-        uses: actions/upload-artifact@v3
-        with:
-          name: firmware.zip
-          if-no-files-found: ignore
-          path: |
-            *.uf2