Add CI flow and fix formatting

Author: ActoryOu

.github/workflows/ci.yml

@@ -130,6 +130,18 @@ jobs:
           cmake -S . -B build -DFREERTOS_PLUS_TCP_TEST_CONFIGURATION=DEFAULT_CONF
           cmake --build build --target clean
           cmake --build build --target freertos_plus_tcp_build_test
+      - name: Build checks (Header Self Contain)
+        run: |
+          cmake -S . -B build -DFREERTOS_PLUS_TCP_TEST_CONFIGURATION=ENABLE_ALL -DTEST_HEADER_SELF_CONTAINED=ON
+          cmake --build build --target clean
+          cmake --build build --target freertos_plus_tcp_build_test_TEST_HEADER_INC_ONLY_DHCP
+          cmake --build build --target freertos_plus_tcp_build_test_TEST_HEADER_INC_ONLY_DNS
+          cmake --build build --target freertos_plus_tcp_build_test_TEST_HEADER_INC_ONLY_IP
+          cmake --build build --target freertos_plus_tcp_build_test_TEST_HEADER_INC_ONLY_ND
+          cmake --build build --target freertos_plus_tcp_build_test_TEST_HEADER_INC_ONLY_ROUTING
+          cmake --build build --target freertos_plus_tcp_build_test_TEST_HEADER_INC_ONLY_SOCKETS
+          cmake --build build --target freertos_plus_tcp_build_test_TEST_HEADER_INC_ONLY_NETWORKBUFFERMANAGEMENT
+          cmake --build build --target freertos_plus_tcp_build_test_TEST_HEADER_INC_ONLY_NETWORKINTERFACE
 
   complexity:
     runs-on: ubuntu-latest

test/build-combination/CMakeLists.txt

@@ -103,7 +103,7 @@ else()
         $<$<COMPILE_LANG_AND_ID:C,Clang>:-Wno-unused-macros>
         $<$<COMPILE_LANG_AND_ID:C,Clang,GNU>:-Wno-unused-variable>
     )
-    
+
     target_link_libraries(freertos_plus_tcp_build_test
       PRIVATE
         freertos_plus_tcp