Refactor input to use stdio drivers for Keyboard and TCP

keyboard_stdio.h

@@ -0,0 +1,18 @@
+#ifndef KEYBOARD_STDIO_H
+#define KEYBOARD_STDIO_H
+
+#include <stdbool.h>
+
+/**
+ * Initializes the keyboard stdio driver.
+ * This allows standard C input functions (getchar, scanf, etc.) to read from the USB keyboard.
+ */
+void keyboard_stdio_init(void);
+
+/**
+ * Pushes a character into the keyboard input buffer.
+ * This should be called by the USB HID report handler.
+ */
+void keyboard_stdio_push_char(char c);
+
+#endif