Finish firmware private transport stack

CMakeLists.txt

@@ -17,6 +17,14 @@ find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 
 project(new_kbd)
 
+if(NOT c_std_11 IN_LIST CMAKE_C_COMPILE_FEATURES)
+  list(APPEND CMAKE_C_COMPILE_FEATURES c_std_11)
+endif()
+
+set(PROTOBUF_PROTOC_EXECUTABLE
+    "${CMAKE_CURRENT_SOURCE_DIR}/scripts/protoc_nanopb.bat"
+    CACHE FILEPATH "Project-local protoc wrapper for nanopb" FORCE)
+
 list(APPEND CMAKE_MODULE_PATH ${ZEPHYR_BASE}/modules/nanopb)
 include(nanopb)
 
@@ -40,6 +48,8 @@ zephyr_nanopb_sources(app
     KeyBorad/proto/keyboard.proto
 )
 
+target_link_libraries(app PRIVATE nanopb)
+
 target_sources(app PRIVATE
     src/main.c
     src/events/battery_status_event.c