refactor(output config): move to config crate

this allows the greeter to easily sync to the user config

src/config/types.rs

@@ -1,18 +1,4 @@
 // SPDX-License-Identifier: GPL-3.0-only
 #![allow(non_snake_case)]
 
-use serde::{Deserialize, Serialize};
-pub use smithay::{input::keyboard::XkbConfig as WlXkbConfig, utils::Transform};
-
-#[derive(Serialize, Deserialize)]
-#[serde(remote = "Transform")]
-pub enum TransformDef {
-    Normal,
-    _90,
-    _180,
-    _270,
-    Flipped,
-    Flipped90,
-    Flipped180,
-    Flipped270,
-}
+pub use smithay::input::keyboard::XkbConfig as WlXkbConfig;