feat: Complete target system with C# bindings and resource inference

- Add comprehensive target system with TargetRegistry and target-aware compilation
- Implement resource type inference from policy equality expressions
- Create modular C# bindings with separate wrapper classes for each concept
- Add thread-safe CompiledPolicy with reference counting for safe disposal
- Enhance FFI with detailed error propagation and target functionality
- Create TargetExampleApp demonstrating Azure Policy integration
- Add CI/CD pipeline testing for all C# applications
- Support target definitions with schema validation and resource selectors
- Implement PolicyModule struct and target-aware compilation methods
- Add comprehensive test coverage for target functionality

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>

Author: anakrish

.github/workflows/test-csharp.yml

@@ -140,12 +140,38 @@ jobs:
         uses: actions/download-artifact@v4
         with:
           name: regorus-nuget
-          path: ./bindings/csharp/Regorus.Tests/regorus-nuget/
+          path: ./bindings/csharp/regorus-nuget/
 
       - name: Restore Regorus.Tests
-        run: dotnet restore /p:RestoreAdditionalProjectSources=./regorus-nuget
+        run: dotnet restore /p:RestoreAdditionalProjectSources=../regorus-nuget
         working-directory: ./bindings/csharp/Regorus.Tests
 
       - name: Run Regorus.Tests
         run: dotnet test --no-restore
         working-directory: ./bindings/csharp/Regorus.Tests
+
+      - name: Restore TestApp
+        run: dotnet restore /p:RestoreAdditionalProjectSources=../regorus-nuget
+        working-directory: ./bindings/csharp/TestApp
+
+      - name: Build TestApp
+        run: dotnet build --no-restore
+        working-directory: ./bindings/csharp/TestApp
+
+      - name: Run TestApp
+        run: dotnet run --no-build --framework net8.0
+        working-directory: ./bindings/csharp/TestApp
+
+      - name: Restore TargetExampleApp
+        run: dotnet restore /p:RestoreAdditionalProjectSources=../regorus-nuget
+        working-directory: ./bindings/csharp/TargetExampleApp
+
+      - name: Build TargetExampleApp
+        run: dotnet build --no-restore
+        working-directory: ./bindings/csharp/TargetExampleApp
+
+      - name: Run TargetExampleApp
+        run: dotnet run --no-build --framework net8.0
+        working-directory: ./bindings/csharp/TargetExampleApp
+
+      

Cargo.lock

@@ -93,6 +93,7 @@ anyhow = { version = "1.0.45", default-features = false }
 serde = {version = "1.0.150", default-features = false, features = ["derive", "rc"] }
 serde_json = { version = "1.0.89", default-features = false, features = ["alloc"] }
 lazy_static =  { version = "1.4.0", default-features = false }
+thiserror = { version = "2.0", default-features = false }
 
 data-encoding = { version = "2.8.0", optional = true, default-features=false, features = ["alloc"] }
 scientific = { version = "0.5.3" }