chore: reorganize source organization to a more modern style

CMakeLists.txt

@@ -24,12 +24,18 @@ project(ensaht C CXX ASM)
 
 # Add executable. Default name is the project name, version 0.1
 
-add_executable(ensaht main.c mqtt.c bmp.c aht.c ens.c)
+add_executable(ensaht
+  src/main.c
+  src/mqtt.c
+  src/bmp.c
+  src/aht.c
+  src/ens.c
+)
 
 # Add the standard include files to the build
 target_include_directories(ensaht PRIVATE
   ${CMAKE_CURRENT_LIST_DIR}
-  ${CMAKE_CURRENT_LIST_DIR}/inc
+  ${CMAKE_CURRENT_LIST_DIR}/include
   ${CMAKE_CURRENT_LIST_DIR}/.. # for our common lwipopts or any other standard includes, if required
 )
 pico_set_program_name(ensaht "ensaht")