Add note on examples (#597)

Author: almarklein

examples/README.md

@@ -0,0 +1,15 @@
+# The wgpu Examples
+
+Please note that the examples you see on Github may not be compatible with the
+wgpu version you've installed on your system.
+
+You can:
+
+* View the examples in the online docs:
+  * TODO: the gallery is not implemented yet.
+* View the examples at the version you've installed:
+  * In the url `https://github.com/pygfx/wgpu-py/tree/main/examples` you can replace `main`
+    with e.g. `vx.y.z` to see the compatible version.
+* Install the bleeding edge version of wgpu-py:
+  * Checkout the [developers section](https://github.com/pygfx/wgpu-py?tab=readme-ov-file#developers) in the readme.
+