added free osillations demo

Author: pawbz

src/eqdata/polarization.jl

@@ -1,5 +1,5 @@
 ### A Pluto.jl notebook ###
-# v0.19.46
+# v0.20.4
 
 #> [frontmatter]
 #> layout = "layout.jlhtml"
@@ -11,12 +11,14 @@ using InteractiveUtils
 
 # This Pluto notebook uses @bind for interactivity. When running this notebook outside of Pluto, the following 'mock version' of @bind gives bound variables a default value (instead of an error).
 macro bind(def, element)
+    #! format: off
     quote
         local iv = try Base.loaded_modules[Base.PkgId(Base.UUID("6e696c72-6542-2067-7265-42206c756150"), "AbstractPlutoDingetjes")].Bonds.initial_value catch; b -> missing; end
         local el = $(esc(element))
         global $(esc(def)) = Core.applicable(Base.get, el) ? Base.get(el) : iv(el)
         el
     end
+    #! format: on
 end
 
 # ╔═╡ 1d229d0c-2ffd-11ed-0cb3-1964ddd3b5af