Added more tests

tests/programs/add.q

@@ -0,0 +1,9 @@
+main() {
+	assert 0 + 0 == 0
+	assert 1 + 1 == 2
+	assert 1 + 2 == 3
+	assert 2 + 1 == 3
+	assert 2 + 2 == 4
+	assert 4 + 2 == 6
+	assert 8 + 2 == 10
+}