Add basic LJ potential*

- Add PairPotential Abstract class
- Add Lennard-Jones potential that should work with both CUDA and C++
  code
- Add tests on HOST side for LJ potential

CMakeLists.txt

@@ -8,9 +8,19 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 # Default settings 
 add_compile_options(-Wall -Wextra -Wpedantic)
 
+add_compile_options($<$<COMPILE_LANGUAGE:CUDA>:-Wno-pedantic>)
+
+# Add pedantic just for 
+
 set(CMAKE_CXX_STANDARD 17)
+
+# Cuda Settings
 set(CMAKE_CUDA_ARCHITECTURES 61)
 set(CUDA_SEPARABLE_COMPILATION ON)
+# Cuda settings to get correct compile_commands.json
+set(CMAKE_CUDA_USE_RESPONSE_FILE_FOR_INCLUDES 0)
+set(CMAKE_CUDA_USE_RESPONSE_FILE_FOR_LIBRARIES 0)
+set(CMAKE_CUDA_USE_RESPONSE_FILE_FOR_OBJECTS 0)
 
 # Add Vec3  as a dependency
 include(FetchContent)
@@ -24,9 +34,9 @@ if(NOT Vec3_POPULATED)
     include_directories(${Vec3_SOURCE_DIR})
 endif()
 
+include_directories(/usr/local/cuda-12.8/include)
 include_directories(src)
 include_directories(kernels)
-include_directories(/usr/local/cuda-12.8/include)
 
 add_subdirectory(src)
 add_subdirectory(kernels)
@@ -35,21 +45,19 @@ add_subdirectory(tests)
 add_executable(${NAME} main.cpp)
 install(DIRECTORY src/ DESTINATION src/)
 
-
 target_link_libraries(
     ${NAME} 
     PRIVATE
     ${NAME}_lib 
     ${NAME}_cuda_lib 
-    
     ${CUDA_LIBRARIES}
 )
 
 # Doxygen Build
-option(BUILD_DOC "Build Documentation" ON)
+option(BUILD_DOC "Build Documentation" OFF)
 
 find_package(Doxygen)
-if(DOXYGEN_FOUND)
+if(DOXYGEN_FOUND AND BUILD_DOC)
     set(BUILD_DOC_DIR ${CMAKE_SOURCE_DIR}/build/docs)
     if(NOT EXISTS ${BUILD_DOC_DIR})
         file(MAKE_DIRECTORY ${BUILD_DOC_DIR})
@@ -65,6 +73,6 @@ if(DOXYGEN_FOUND)
             WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
             COMMENT "Generating API documentation with Doxygen"
             VERBATIM)
-else(DOXYGEN_FOUND)
+else(DOXYGEN_FOUND AND BUILD_DOC)
     message("Doxygen needs to be installed to generate the documentation.")
-endif(DOXYGEN_FOUND)
+endif(DOXYGEN_FOUND AND BUILD_DOC)