head-management: add compositor-space-positioner-v1 extension

wire/jay_head_ext_compositor_space_positioner_v1.txt

@@ -0,0 +1,15 @@
+request destroy (destructor) {
+
+}
+
+request set_position {
+    x: i32,
+    y: i32,
+}
+
+event range {
+    x_min: i32,
+    y_min: i32,
+    x_max: i32,
+    y_max: i32,
+}

wire/jay_head_manager_ext_compositor_space_positioner_v1.txt

@@ -0,0 +1,7 @@
+request destroy (destructor) {
+
+}
+
+event head {
+    head: id(jay_head_ext_compositor_space_positioner_v1) (new),
+}