Add 01_blinky_button

apps/01_blinky_button/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.20.0)
+
+# Locate the Zephyr build system as a CMake package
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+# Project name
+project(blinky_button)
+
+# Add source files belong to this application
+target_sources(app PRIVATE src/main.c)