$mol_file improve copy api 2

file/file.node.ts

@@ -81,7 +81,7 @@ namespace $ {
 
 		@ $mol_mem
 		override stat(next? : $mol_file_stat | null, virt?: 'virt') {
-			this.copy_sync()
+			if (next === undefined) this.copy_sync()
 			let stat = next
 			const path = this.path()
 
@@ -114,6 +114,10 @@ namespace $ {
 
 		}
 
+		override copy(to: string) {
+			$node.fs.copyFileSync(this.path(), to)
+		}
+
 		@ $mol_action
 		override drop() {
 			$node.fs.unlinkSync( this.path() )

file/file.ts

@@ -126,19 +126,19 @@ namespace $ {
 		buffer( next? : Uint8Array ) { return next ?? new Uint8Array }
 
 		@ $mol_mem
-		copy_src(path?: string) {
-			return path ?? null
-		}
+		copy_src(path?: string) { return path ?? null }
+
+		copy(to: string) {}
 
 		@ $mol_mem
 		copy_sync() {
 			const src_path = this.copy_src()
-			if (! src_path) return null
+			if (! src_path) return false
 			const src = this.$.$mol_file.absolute(src_path)
 			src.stat()
-			$node.fs.copyFileSync(src.path(), this.path())
+			src.copy(this.path())
 
-			return null
+			return true
 		}
 
 		@ $mol_mem