Annote E V E R Y T H I N G with license info

src/main/CMakeLists.txt

@@ -1,3 +1,7 @@
+# Copyright 2023 jacqueline <me@jacqueline.id.au>
+#
+# SPDX-License-Identifier: GPL-3.0-only
+
 idf_component_register(
   SRCS "main.cpp" "app_console.cpp"
   INCLUDE_DIRS "."

src/main/app_console.cpp

@@ -1,3 +1,9 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 #include "app_console.hpp"
 
 #include <dirent.h>

src/main/app_console.hpp

@@ -1,3 +1,9 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 #pragma once
 
 #include <memory>

src/main/main.cpp

@@ -1,3 +1,9 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 #include <dirent.h>
 #include <stdint.h>
 #include <stdio.h>