Show a newly created bot in the rail at once

The rail was built from page props and only knew bots it already had, so a
bot the coordinator created did not appear until a reload.

create_bot and add_bot_to_workspace now push server:bot-created
(BotCreatedData) to everyone who sees the bot: its rail row, the
workspaces it is in, and whether it belongs in that user's own chat list.
useLiveBots inserts it, after the pinned coordinator outside a workspace
and only when the open workspace is one it joined. liveRelay pushes created
bots too, so a bot added by another process still shows.

src/types/index.ts

@@ -124,6 +124,16 @@ export type BotJobUpdateData = BUN_SQLITE_COBBLE_BOTS_QUEUE_UPDATES & {
     session_id: number | null;
 };
 
+/**
+ * `server:bot-created` data: a bot the user can now see, the workspaces
+ * it's in, and whether it belongs in their own chat list (the main rail).
+ */
+export type BotCreatedData = {
+    bot: BotWithLastMessage;
+    workspace_ids: number[];
+    in_own_chat: boolean;
+};
+
 /**
  * `server:bot-updated` data: the bot's new face and status line, and its
  * active task (null when there is none).
@@ -535,6 +545,11 @@ export const WebSocketEvents = [
      * `bot_messages` row)
      */
     "server:bot-message",
+    /**
+     * A bot joined the crew or one of the user's workspaces (`data`:
+     * `BotCreatedData`)
+     */
+    "server:bot-created",
     /**
      * A bot's face or status line changed (`data`: `BotUpdatedData`)
      */