- move source file according with platformio standard directory structure

- remove lib_deps from platformio.ini since they are already in libs folder

src/CharBuffer.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#define CHAR_BUFFER_SIZE 4096
+
+class CharBuffer
+{
+public:
+    static void initialize();
+    static char* get();
+
+private:
+    static char* _buffer;
+};