refactor(CMake): Update include directories for main target

- Reintroduced the target include directory for the main target to use a hardcoded path.
- Removed the previous target include directory declaration to streamline the configuration.

CMakeLists.txt

@@ -26,8 +26,6 @@ include_directories(
     $<$<NOT:$<BOOL:${PahoMqttC_FOUND}>>:${PAHO_MQTT_C_INCLUDE_DIR}>
 )
 
-target_include_directories(main PRIVATE /usr/local/include)
-
 # Source files
 set(SOURCES
     src/main.cpp
@@ -39,11 +37,13 @@ set(SOURCES
     src/navigation.cpp
 )
 
-# Create executable with simple name
 add_executable(main ${SOURCES})
 
+target_include_directories(main PRIVATE /usr/local/include)
+
 # Link libraries
 target_link_libraries(main
+    PRIVATE
     unitree_sdk2
     Threads::Threads
     $<$<BOOL:${PahoMqttC_FOUND}>:PahoMqttC::PahoMqttC>