[examples] Add PinScan example

examples/PinScan/src/ui.cpp

@@ -0,0 +1,37 @@
+/* Copyright (c) Kuba Szczodrzyński 2022-07-31. */
+
+#include "main.h"
+
+bool ansi		   = true;
+bool ansiSkipErase = false;
+
+void printAnsi(const char *str) {
+	if (ansi)
+		stream->print(str);
+}
+
+void printAnsiErase() {
+	if (!ansiSkipErase)
+		printAnsi(ANSI_ERASE ANSI_HOME);
+	ansiSkipErase = false;
+}
+
+void line() {
+	stream->print("--------");
+	if (output == -1) {
+		stream->print("TELNET");
+	} else {
+		stream->print(" UART");
+		stream->print(output);
+		stream->write(' ');
+	}
+	stream->print("--------");
+	stream->println();
+}
+
+int inputPin() {
+	stream->print("Enter pin number: ");
+	int pin = stream->parseInt();
+	stream->println();
+	return pin;
+}