feat: add Clone Database to Docker functionality

Clone any database to a local Docker PostgreSQL container with schema
and/or data transfer via pg_dump. Supports three modes: schema only,
full clone, and sample data. Includes container lifecycle management
(start/stop/remove) in the Admin panel, progress tracking with
collapsible process log, and automatic connection creation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src-tauri/src/commands/mod.rs

@@ -1,6 +1,7 @@
 pub mod ai;
 pub mod connections;
 pub mod data;
+pub mod docker;
 pub mod export;
 pub mod history;
 pub mod lookup;