completed migrate to tauri-sql

src-tauri/migrations/20230418080146_create_chats.sql

@@ -0,0 +1,10 @@
+-- Add migration script here
+-- create chats table
+CREATE TABLE
+  chats (
+    id INTEGER NOT NULL PRIMARY KEY,
+    account_id INTEGER NOT NULL,
+    pubkey TEXT NOT NULL UNIQUE,
+    created_at INTEGER NOT NULL,
+    FOREIGN KEY (account_id) REFERENCES accounts (id)
+  );