add support for REST-ful API building

- allow parameters within url
- allow different methods other then just POST
-> still needs to be tested!

Pilz.UI/Controls/ConfigurationManager/ConfigurationEntry.cs

@@ -0,0 +1,10 @@
+namespace Pilz.UI.Controls.ConfigurationManager;
+
+public class ConfigurationEntry(string name, string title, ConfigurationValueListener Listener)
+{
+    public event EventHandler? OnValueChanged;
+
+    public string Name { get; } = name;
+    public string Title { get; } = title;
+    public ConfigurationValueListener Listener { get; } = Listener;
+}