Add GitHub workflow

.github/workflows/cmake-aarch64.yaml

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+# This starter workflow is for a CMake project running on a single platform. There is a different starter workflow if you need cross-platform coverage.
+# See: https://github.com/actions/starter-workflows/blob/main/ci/cmake-multi-platform.yml
+name: aarch64
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
+  BUILD_TYPE: Release
+  TOOLCHAIN_URL: https://storage.googleapis.com/remarkable-codex-toolchain/3.14.3.0/meta-toolchain-remarkable-4.0.813-ferrari-public-x86_64-toolchain.sh
+  TOOLCHAIN_DIR: toolchain
+
+jobs:
+  build:
+    # The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
+    # You can convert this to a matrix build if you need cross-platform coverage.
+    # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Cache Toolchain
+      id: cache-toolchain
+      uses: actions/cache@v3
+      with:
+        path: ${{ github.workspace }}/${{ env.TOOLCHAIN_DIR }}
+        key: ${{ runner.os }}-toolchain-${{ hashFiles('**/cmake-aarch64.yaml') }}
+
+    - name: Download and Install Toolchain
+      if: steps.cache-toolchain.outputs.cache-hit != 'true'
+      run: |
+        wget ${{ env.TOOLCHAIN_URL }} -O toolchain.sh
+        chmod +x toolchain.sh
+        ./toolchain.sh -y -d ${{ github.workspace }}/${{ env.TOOLCHAIN_DIR }}
+
+    - name: Source Toolchain Environment
+      run: |
+        source ${{ github.workspace }}/${{ env.TOOLCHAIN_DIR }}/environment-setup-cortexa53-crypto-remarkable-linux
+        env >> $GITHUB_ENV
+
+    - name: Configure CMake
+      # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
+      # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
+      run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+
+    - name: Build
+      # Build your program with the given configuration
+      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}