Added cmake file for picoexplorer mpy wrapper

micropython/modules/pico_explorer/usermod.cmake

@@ -0,0 +1,21 @@
+add_library(usermod_pico_explorer INTERFACE)
+
+target_sources(usermod_pico_explorer INTERFACE
+    ${CMAKE_CURRENT_LIST_DIR}/pico_explorer.c
+    ${CMAKE_CURRENT_LIST_DIR}/pico_explorer.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/../../../libraries/pico_explorer/pico_explorer.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/../../../drivers/st7789/st7789.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/../../../libraries/pico_graphics/pico_graphics.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/../../../libraries/pico_graphics/types.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/../../../libraries/pico_graphics/font_data.cpp
+)
+
+target_include_directories(usermod_pico_explorer INTERFACE
+    ${CMAKE_CURRENT_LIST_DIR}
+)
+
+target_compile_definitions(usermod_pico_explorer INTERFACE
+    -DMODULE_PICODISPLAY_ENABLED=1
+)
+
+target_link_libraries(usermod INTERFACE usermod_pico_explorer)