[bun:sqlite] Add sqlite-type symbol for Database

Author: himself65

src/js/bun/sqlite.ts

@@ -438,6 +438,8 @@ class Database implements SqliteTypes.Database {
     return SQL.isInTransaction(this.#handle);
   }
 
+  // Mark the Database prototype with a symbol to identify it as a bun-specific sqlite database.
+  // This is useful for the package author to detect which sqlite implementation is being used.
   get [sqliteTypeSymbol]() {
     return "bun:sqlite";
   }