Emulator+Test: Add main and example unit test

src/main.cpp

@@ -0,0 +1,12 @@
+#include <cstdio>
+
+#include "ruc/timer.h"
+
+int main(int argc, char* argv[])
+{
+	ruc::Timer t;
+
+	printf("%fms\n", t.elapsedNanoseconds() / 1000000.0);
+
+	return 0;
+}

test/testthing.cpp

@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "macro.h"
+#include "testcase.h"
+#include "testsuite.h"
+
+// -----------------------------------------
+
+TEST_CASE(Thing)
+{
+	int a = 5;
+	EXPECT_EQ(a, 5);
+}