Add initial github ci

.github/workflows/build.yml

@@ -0,0 +1,24 @@
+name: build
+on:
+  push:
+    branches:
+      - master
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: |
+        https://github.com/loongson/build-tools/releases/download/2023.08.08/x86_64-cross-tools-loongarch64-binutils_2.41-gcc_13.2.0.tar.xz
+        tar -vxf x86_64-cross-tools-loongarch64-binutils_2.41-gcc_13.2.0.tar.xz -C /opt
+      - run: |
+        export PATH=/opt/cross-tools/bin:$PATH
+        export PACKAGES_PATH=$PWD/edk2:$PWD/edk2-platforms:$PWD/edk2-non-osi
+        export GCC5_LOONGARCH64_PREFIX=loongarch64-unknown-linux-gnu-
+        . edk2/edksetup.sh
+        make -C edk2/BaseTools
+        build --buildtarget=RELEASE --tagname=GCC5 --arch=LOONGARCH64  --platform=Platform/Loongson/LoongArchQemuPkg/Loongson.dsc
+      - uses: actions/upload-artifact@v4
+        with:
+          name: firmware
+          path: Build/LoongArchQemu/RELEASE_GCC5/FV/*.fd

.gitmodules

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+[submodule "edk2"]
+	path = edk2
+	url = https://github.com/tianocore/edk2.git
+[submodule "edk2-non-osi"]
+	path = edk2-non-osi
+	url = https://github.com/tianocore/edk2-non-osi.git
+[submodule "edk2-platforms"]
+	path = edk2-platforms
+	url = https://github.com/tianocore/edk2-platforms.git