Make documenter a test package

Author: ufechner7

Project.toml

@@ -17,6 +17,7 @@ WinchModels = "7dcfa46b-7979-4771-bbf4-0aee0da42e1f"
 [compat]
 BenchmarkTools = "1.6.0"
 ControlPlots = "0.2.7"
+Documenter = "1.11.4"
 KiteUtils = "0.10.6"
 NLsolve = "4.5.1"
 Parameters = "0.12.3"
@@ -28,8 +29,9 @@ WinchModels = "0.3.7"
 julia = "1.10, 1.11"
 
 [extras]
-Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 ControlPlots = "23c2ee80-7a9e-4350-b264-8e670f12517c"
+Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [targets]
-test = ["Test", "ControlPlots"]
+test = ["Test", "ControlPlots", "Documenter"]