Add lever and jump pad components with activation logic

addons/rmsmartshape/documentation/Godot4.md

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+# Using SmartShape2D with Godot 4
+
+Godot 4 moved `repeat` for textures as an import option to a per-node option. On how to make textures repeat and
+set normal maps see [section below.](#repeating-textures-and-normal-textures-with-canvastexture)
+
+By default, **shape resources are shared** when the shape is copy-pasted. Editing points will edit every copy of that shape.
+To make point geometry unique, press **"Make Unique"** property button in Geometry property group in the inspector:
+
+![Making Shape Geometry Unique](imgs/godot4-make-points-unique.png)
+
+## Repeating Textures and Normal Textures with CanvasTexture
+
+CanvasItem, the base class of Node2D has a Texture section with `repeat`.  If you aren't using a normal, you can set it here.
+By default, this setting is inherited by children nodes so you could set it on a parent node (assuming all the children need
+repeating textures or it's easier to disable for a few specific nodes than turn it on for most).
+
+![Creating CanvasTexture](imgs/canvas-item-repeat.png)
+
+Normal textures are no longer set in a material resource.
+
+To set normal textures, you can create a `CanvasTexture` resource in the inspector on any property, that allows setting a `Texture2D`.
+
+![Creating CanvasTexture](imgs/godot4-create-texture-res.png)
+
+`CanvasTexture` allows you to assign diffuse texture and normal map texture, as well as set textures to `repeat`:
+
+![Assigning Texture, Normal Map and Setting Repeat flag](img/../imgs/godot4-assign-normal-tex.png)
+
+## Converting Projects from Godot 3.x
+
+Scene files with shapes saved in Godot 3.x should load in Godot 4 project. However, you may encounter some issues. Here is a list of expected problems:
+1. Textures are looking weird, not repeated.
+2. Normal textures are not used.
+
+Please read the section on [how to set repeat and use normal textures in Godot 4](#repeating-textures-and-normal-textures-with-canvastexture).
+
+## Removed Features
+
+- The Godot 4 version of this addon does not support 1.x RMSmartShape2D nodes anymore.
+- SS2D_Shape_Meta node was removed, since its functionality is available  copy-pasted shapes by default.