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

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

jay-config/src/_private/ipc.rs

@@ -812,6 +812,10 @@ pub enum ClientMessage<'a> {
         show: bool,
     },
     GetShowTitles,
+    SetFloatingTitles {
+        floating: bool,
+    },
+    GetFloatingTitles,
     GetWorkspaceConnector {
         workspace: Workspace,
     },
@@ -1114,6 +1118,9 @@ pub enum Response {
     GetShowTitles {
         show: bool,
     },
+    GetFloatingTitles {
+        floating: bool,
+    },
     GetWorkspaceConnector {
         connector: Connector,
     },