renderer: add support for floating-titlebars (#4)

Reviewed-on: https://git.kosslan.dev/wry/jay/pulls/4

toml-config/src/config.rs

@@ -80,6 +80,8 @@ pub enum SimpleCommand {
     ToggleBar,
     ShowTitles(bool),
     ToggleTitles,
+    FloatTitles(bool),
+    ToggleFloatTitles,
     FocusHistory(Timeline),
     FocusLayerRel(LayerDirection),
     FocusTiles,
@@ -224,6 +226,8 @@ pub struct Theme {
     pub bar_position: Option<BarPosition>,
     pub bar_separator_width: Option<i32>,
     pub gap: Option<i32>,
+    pub floating_titles: Option<bool>,
+    pub title_gap: Option<i32>,
 }
 
 #[derive(Debug, Clone)]