feat: add Zero schema with 6 table definitions and relationships

- Create zero/tables/inbox.ts (notifications)
- Create zero/tables/documents.ts (documents, search_source_connectors)
- Create zero/tables/chat.ts (new_chat_messages, chat_comments, chat_session_state)
- Create zero/schema.ts (combines tables, defines relationships, exports zql)
- Consolidate Zero type augmentations into types/zero.d.ts

surfsense_web/zero/tables/chat.ts

@@ -0,0 +1,34 @@
+import { table, string, number, json } from "@rocicorp/zero";
+
+export const newChatMessageTable = table("new_chat_messages")
+	.columns({
+		id: number(),
+		role: string(),
+		content: json(),
+		threadId: number().from("thread_id"),
+		authorId: string().optional().from("author_id"),
+		createdAt: number().from("created_at"),
+	})
+	.primaryKey("id");
+
+export const chatCommentTable = table("chat_comments")
+	.columns({
+		id: number(),
+		messageId: number().from("message_id"),
+		threadId: number().from("thread_id"),
+		parentId: number().optional().from("parent_id"),
+		authorId: string().optional().from("author_id"),
+		content: string(),
+		createdAt: number().from("created_at"),
+		updatedAt: number().from("updated_at"),
+	})
+	.primaryKey("id");
+
+export const chatSessionStateTable = table("chat_session_state")
+	.columns({
+		id: number(),
+		threadId: number().from("thread_id"),
+		aiRespondingToUserId: string().optional().from("ai_responding_to_user_id"),
+		updatedAt: number().from("updated_at"),
+	})
+	.primaryKey("id");