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/error.rs

@@ -23,6 +23,9 @@ pub enum TuskError {
     #[error("AI error: {0}")]
     Ai(String),
 
+    #[error("Docker error: {0}")]
+    Docker(String),
+
     #[error("{0}")]
     Custom(String),
 }