docs: unpublished git install, package title, and author (#17)

Keep the native mailbox README. Do not restore pre-native vocabulary,
listUserMailbox, or thread helper APIs. @corbits/mailbox is not on npm.

Author: TheGreatAxios

README.md

@@ -1,4 +1,4 @@
-# corbits-mailbox
+# @corbits/mailbox
 
 **[`@corbits/mailbox`](./package.json)** has one job: give a human principal
 a native Interchange mailbox — a real `@intx/mailbox` `MailboxStore` backed by
@@ -97,10 +97,10 @@ their INBOX, deduped on the frame's Message-ID within that mailbox.
 
 ## Install
 
-```sh
-# from npm (ships prebuilt dist/)
-bun add @corbits/mailbox
+Not published to npm yet. Until a registry publish, `bun add @corbits/mailbox`
+404s. Git is the install path.
 
+```sh
 # from git (prepare hook builds dist/ on the way in)
 bun add github:corbitsdev/corbits-mailbox
 ```

package.json

@@ -14,7 +14,7 @@
     "drizzle",
     "postgres"
   ],
-  "author": "Corbits",
+  "author": "Sawyer Cutler <sawyer@dirtroad.dev>",
   "homepage": "https://github.com/corbitsdev/corbits-mailbox#readme",
   "repository": {
     "type": "git",