Restructure into different files

test-str.zig

@@ -0,0 +1,10 @@
+pub fn main() void {
+    _ = ohyes("sdf"); // everything is fine
+}
+
+fn ohyes(str: []const u8) []const u8 {
+    //const foo = "ohyes";
+    _ = str;
+    return "sdfg"; // foo is already a pointer, or rather
+    // foo was a pointer all along
+}