feat(ci): expand C++ test coverage with multiple compilers

Add debug and release builds for GCC and Clang on Ubuntu. Introduce
release builds and Clang tests for Windows. Enhance CI pipeline to
ensure broader compatibility and performance across environments.

.github/workflows/ci.yml

@@ -13,14 +13,29 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - name: Install g++
-      run: sudo apt-get update && sudo apt-get install -y g++
+    - name: Install g++ and clang
+      run: sudo apt-get update && sudo apt-get install -y g++ clang
 
-    - name: Compile and Run C++ Tests
+    - name: Compile and Run C++ Tests (Debug - GCC)
       run: |
         g++ -std=c++20 -g -o crdt tests.cpp && ./crdt
         g++ -std=c++20 -g -o list-crdt list_tests.cpp && ./list-crdt
 
+    - name: Compile and Run C++ Tests (Release - GCC)
+      run: |
+        g++ -std=c++20 -O3 -DNDEBUG -o crdt_release tests.cpp && ./crdt_release
+        g++ -std=c++20 -O3 -DNDEBUG -o list-crdt_release list_tests.cpp && ./list-crdt_release
+
+    - name: Compile and Run C++ Tests (Debug - Clang)
+      run: |
+        clang++ -std=c++20 -g -o crdt_clang tests.cpp && ./crdt_clang
+        clang++ -std=c++20 -g -o list-crdt_clang list_tests.cpp && ./list-crdt_clang
+
+    - name: Compile and Run C++ Tests (Release - Clang)
+      run: |
+        clang++ -std=c++20 -O3 -DNDEBUG -o crdt_clang_release tests.cpp && ./crdt_clang_release
+        clang++ -std=c++20 -O3 -DNDEBUG -o list-crdt_clang_release list_tests.cpp && ./list-crdt_clang_release
+
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
@@ -52,18 +67,30 @@ jobs:
       with:
         args: install llvm
 
-    - name: Compile and Run C++ Tests with MSVC
+    - name: Compile and Run C++ Tests with MSVC (Debug)
       run: |
         cl.exe /std:c++20 /EHsc /Fe:crdt.exe tests.cpp && .\crdt.exe
         cl.exe /std:c++20 /EHsc /Fe:list-crdt.exe list_tests.cpp && .\list-crdt.exe
       shell: cmd
 
-    - name: Compile and Run C++ Tests with Clang
+    - name: Compile and Run C++ Tests with MSVC (Release)
+      run: |
+        cl.exe /std:c++20 /EHsc /O2 /DNDEBUG /Fe:crdt_release.exe tests.cpp && .\crdt_release.exe
+        cl.exe /std:c++20 /EHsc /O2 /DNDEBUG /Fe:list-crdt_release.exe list_tests.cpp && .\list-crdt_release.exe
+      shell: cmd
+
+    - name: Compile and Run C++ Tests with Clang (Debug)
       run: |
         clang++ -std=c++20 -g -o crdt_clang.exe tests.cpp && .\crdt_clang.exe
         clang++ -std=c++20 -g -o list-crdt_clang.exe list_tests.cpp && .\list-crdt_clang.exe
       shell: cmd
 
+    - name: Compile and Run C++ Tests with Clang (Release)
+      run: |
+        clang++ -std=c++20 -O3 -DNDEBUG -o crdt_clang_release.exe tests.cpp && .\crdt_clang_release.exe
+        clang++ -std=c++20 -O3 -DNDEBUG -o list-crdt_clang_release.exe list_tests.cpp && .\list-crdt_clang_release.exe
+      shell: cmd
+
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with: