wayland: add jay_render_ctx

wire/jay_compositor.txt

@@ -53,6 +53,10 @@ msg get_pointer = 12 {
     seat: id(wl_seat),
 }
 
+msg get_render_ctx = 13 {
+    id: id(jay_render_ctx),
+}
+
 # events
 
 msg client_id = 0 {

wire/jay_render_ctx.txt

@@ -0,0 +1,15 @@
+# requests
+
+msg destroy = 0 {
+
+}
+
+# events
+
+msg no_device = 0 {
+
+}
+
+msg device = 1 {
+    fd: fd,
+}