Add snowflake_holder.v

src/snowflake_holder.v

@@ -0,0 +1,13 @@
+module bonfire
+
+// SnowflakeHolder is a small util class that holds a single snowflake.
+// Useful because all Discord objects have a field named ID.
+[noinit]
+pub struct SnowflakeHolder {
+	id Snowflake
+}
+
+// created_at returns the time the snowflake was created.
+fn (sh SnowflakeHolder) created_at() Time {
+	return sh.id.created_at()
+}