add github actions

.github/workflows/test_cli.yml

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+name: Validate neo-node Compilation with Local neo
+
+on: [push, pull_request]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout neo
+      uses: actions/checkout@v2
+      with:
+        path: ./neo
+
+    - name: Checkout neo-node
+      uses: actions/checkout@v2
+      with:
+        repository: neo-project/neo-node
+        path: ./neo-node
+
+    - name: Patch neo-node neo-cli.csproj to use local neo
+      run: |
+        # Path to neo-cli.csproj in neo-node
+        csproj_path="./neo-node/neo-cli/neo-cli.csproj"
+        # Remove the PackageReference to Neo
+        sed -i '/<PackageReference Include="Neo"/d' $csproj_path
+        # Add a ProjectReference to the local Neo project
+        # Assuming the neo project's main .csproj is in its src/neo directory
+        sed -i '/<\/ItemGroup>/i \    <ProjectReference Include="../../neo/src/Neo/Neo.csproj" />' $csproj_path
+
+    - name: Setup .NET Core
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: '7.x'  # Adjust according to the actual .NET Core version of neo-node
+
+    - name: Restore and build neo-node
+      run: |
+        cd neo-node/neo-cli
+        dotnet restore
+        dotnet build

.github/workflows/test_devpack.yml

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+name: Validate neo-devpack-dotnet Compilation with Local neo
+
+on: [push, pull_request]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout neo
+      uses: actions/checkout@v2
+      with:
+        path: ./neo
+
+    - name: Checkout neo-devpack-dotnet
+      uses: actions/checkout@v2
+      with:
+        repository: neo-project/neo-devpack-dotnet
+        path: ./neo-devpack-dotnet
+
+    - name: Patch neo-devpack-dotnet .csproj to use local neo
+      run: |
+        # Remove the PackageReference to Neo
+        sed -i '/<PackageReference Include="Neo"/d' ./neo-devpack-dotnet/src/Neo.Compiler.CSharp/Neo.Compiler.CSharp.csproj
+        # Add a ProjectReference to the local Neo project
+        # Assuming the neo project's main .csproj is in its root directory
+        sed -i '/<\/ItemGroup>/i \    <ProjectReference Include="../../../neo/src/Neo/Neo.csproj" />' ./neo-devpack-dotnet/src/Neo.Compiler.CSharp/Neo.Compiler.CSharp.csproj
+
+    - name: Setup .NET Core
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: '7.x'  # Adjust according to the actual .NET Core version of neo-devpack-dotnet
+
+    - name: Restore and build neo-devpack-dotnet
+      run: |
+        cd neo-devpack-dotnet/
+        dotnet restore
+        dotnet build
+
+    - name: Test neo-devpack-dotnet
+      run: |
+        cd neo-devpack-dotnet
+        dotnet test

.github/workflows/test_plugins.yml

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+name: Validate neo-modules Compilation with Local neo
+
+on: [push, pull_request]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout neo
+      uses: actions/checkout@v2
+      with:
+        path: ./neo
+
+    - name: Checkout neo-modules
+      uses: actions/checkout@v2
+      with:
+        repository: neo-project/neo-modules
+        path: ./neo-modules
+
+    - name: Patch neo-modules Directory.Build.props to use local neo
+      run: |
+        props_path="./neo-modules/src/Directory.Build.props"
+        sed -i '/<PackageReference Include="Neo"/d' $props_path
+        sed -i '/<\/ItemGroup>/i \    <ProjectReference Include="../../../neo/src/Neo/Neo.csproj" />' $props_path
+
+    - name: Setup .NET Core
+      uses: actions/setup-dotnet@v1
+      with:
+        dotnet-version: '7.x'
+
+    - name: Test neo-modules
+      run: |
+        sudo apt-get --assume-yes install libleveldb-dev libsnappy-dev libc6-dev
+        cd neo-modules/
+        dotnet test
+