CMake: Improvements from kitware

• Add multiple CMake option to control which parts of CDI should be built
• Add installation of the cdilib and associated CMake config file
• Fix some issues with linking
• Fix some issues in cdi-config.cmake

app/CMakeLists.txt

@@ -7,6 +7,6 @@ target_include_directories(cdi PRIVATE
   $<INSTALL_INTERFACE:include
 )
 
-target_link_libraries(cdi PRIVATE cdilib netCDF::netcdf pthread)
+target_link_libraries(cdi PRIVATE cdilib ${cdi_linked_libs})
 target_include_directories(cdi PRIVATE "${PROJECT_BINARY_DIR}/src/config.h")
 target_compile_definitions(cdi PRIVATE  ${cdi_netcdf_definitions})