Renamed gui to simulator as a better structure.

src/simulator/left_panel.odin

@@ -0,0 +1,8 @@
+package simulator
+
+import m "../machine"
+import rl "vendor:raylib"
+
+gui_left_panel :: proc(rect: rl.Rectangle, s: ^m.System) {
+	rl.DrawRectangleLinesEx(rect, 1, rl.DARKGRAY)
+}