Add UART Terminal app

by cool4uma

https://github.com/cool4uma/UART_Terminal/tree/main

applications/plugins/uart_terminal/uart_terminal_custom_event.h

@@ -0,0 +1,7 @@
+#pragma once
+
+typedef enum {
+    UART_TerminalEventRefreshConsoleOutput = 0,
+    UART_TerminalEventStartConsole,
+    UART_TerminalEventStartKeyboard,
+} UART_TerminalCustomEvent;