add reflection example

reflection.zig

@@ -0,0 +1,24 @@
+const std = @import("std");
+
+const Header = struct {
+    magic: u32,
+    name: []const u8,
+};
+
+pub fn main() void {
+    printInfoAboutStruct(Header);
+}
+
+fn printInfoAboutStruct(comptime T: type) void {
+    const info = @typeInfo(T);
+    inline for (info.Struct.fields) |field| {
+        std.debug.print(
+            "{} has field called {} with type {}\n",
+            .{
+                @typeName(T),
+                field.name,
+                @typeName(field.field_type),
+            },
+        );
+    }
+}