fixed warnings

README.md

@@ -65,6 +65,18 @@ cmake --preset conan-release
 cmake --build build -j$(nproc)
 ```
 
+5. **Clean build (wipe and rebuild everything):**
+```bash
+cmake --build build --clean-first -j$(nproc)
+```
+
+6. **Run tests:**
+```bash
+cmake --build build --target test -j$(nproc)
+# or equivalently:
+ctest --test-dir build --output-on-failure -j$(nproc)
+```
+
 #### LLVM/Clang build (clang + lld + ccache — fastest)
 
 A `fast` conan profile is provided that uses **clang**, **lld** (LLVM linker), and **ccache**. Install them into your environment first: