Improve code generation and documentation

examples/Jellyfish.py

@@ -0,0 +1,13 @@
+from geometry_script import *
+
+@tree("Jellyfish")
+def jellyfish(geometry: Geometry, head_radius: Float):
+    curve_points = geometry.curve_to_points(mode='EVALUATED').points
+    for i, points in curve_points:
+        return instance_on_points()
+    head = ico_sphere(radius=head_radius).transform(
+        translation=head_transform.position,
+        rotation=rotate_euler(space='LOCAL', rotation=align_euler_to_vector(vector=head_transform.tangent), rotate_by=(90, 0, 0)),
+        scale=(1, 1, 0.5)
+    )
+    return join_geometry(geometry=[head, geometry])