wayland: add jay_workspace_watcher

wire/jay_compositor.txt

@@ -57,6 +57,10 @@ msg get_render_ctx = 13 {
     id: id(jay_render_ctx),
 }
 
+msg watch_workspaces = 14 {
+    id: id(jay_workspace_watcher),
+}
+
 # events
 
 msg client_id = 0 {

wire/jay_workspace_watcher.txt

@@ -0,0 +1,12 @@
+# requests
+
+msg destroy = 0 {
+
+}
+
+# events
+
+msg new = 0 {
+    id: id(jay_workspace),
+    linear_id: u32,
+}