feat(ccache): Add ccache for unix building systems

Author: RafaelLeeImg

tools/cmake/idf.cmake

@@ -43,4 +43,11 @@ if(NOT __idf_env_set)
     __build_init("${idf_path}")
 
     set_property(GLOBAL PROPERTY __IDF_ENV_SET 1)
+endif()
+
+find_program(CCACHE_PROGRAM ccache)
+if(CCACHE_PROGRAM)
+    # Support Unix Makefiles and Ninja
+    set(CMAKE_C_COMPILER_LAUNCHER   "ccache")
+    set(CMAKE_CXX_COMPILER_LAUNCHER "ccache")
 endif()