Add CairoMakie as a docs dependency

Author: Datseris

docs/Project.toml

@@ -1,6 +1,7 @@
 [deps]
 BenchmarkTools = "6e4b80f9-dd63-53aa-95a3-0cdb28fa8baf"
 BifurcationKit = "0f109fa4-8a5d-4b75-95aa-f515264e7665"
+CairoMakie = "13f3f980-e62b-5c42-98c6-ff1f3baf88f0"
 ControlSystemsBase = "aaaaaaaa-a6ca-5380-bf3e-84a91bcd477e"
 DataInterpolations = "82cc6244-b520-54b8-b5a6-8a565e85f1d0"
 Distributions = "31c24e10-a181-5473-b8eb-7969acd0382f"
@@ -29,6 +30,7 @@ Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 [compat]
 BenchmarkTools = "1.3"
 BifurcationKit = "0.4"
+CairoMakie = "0.13"
 DataInterpolations = "6.5, 8"
 Distributions = "0.25"
 Documenter = "1"