Re-write net docs

packages/util/src/Nip42.ts

@@ -0,0 +1,10 @@
+import {makeEvent} from "./Events.js"
+import {CLIENT_AUTH} from "./Kinds.js"
+
+export const makeRelayAuth = (url: string, challenge: string) =>
+  makeEvent(CLIENT_AUTH, {
+    tags: [
+      ["relay", url],
+      ["challenge", challenge],
+    ],
+  })

packages/util/src/index.ts

@@ -7,6 +7,7 @@ export * from "./Handler.js"
 export * from "./Kinds.js"
 export * from "./Links.js"
 export * from "./List.js"
+export * from "./Nip42.js"
 export * from "./Nip86.js"
 export * from "./Nip98.js"
 export * from "./Profile.js"