added gitea workflow for release builds

.gitea/workflows/build.yaml

@@ -0,0 +1,33 @@
+name: C Release thumbv7em-none-eabihf 
+run-name: Build-Release
+on: [push]
+
+jobs:
+  Build-Release:
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Install dependencies
+        run: apt-get update && apt-get install -y gcc-arm-none-eabi binutils-arm-none-eabi ninja-build cmake
+
+      - name: Check out repository code
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+          
+      - name: Create Build directory
+        run: mkdir build
+
+      - name: Run CMake
+        run: cmake --preset Release -B build -S .
+
+      - name: Build
+        run: cmake --build build
+
+      - name: Archive production artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: firmware
+          path: |
+            build/*.hex
+            build/*.bin