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;
+}

Pilz.UI/Controls/ConfigurationManager/ConfigurationManager.cs

@@ -0,0 +1,20 @@
+namespace Pilz.UI.Controls.ConfigurationManager;
+
+public class ConfigurationManager
+{
+    private readonly List<ConfigurationPanel> panels = [];
+
+    public void Register(ConfigurationPanel panel)
+    {
+        panels.Add(panel);
+    }
+
+    public IEnumerable<Control> Build()
+    {
+        foreach (var panel in panels)
+        {
+            panel.Build(this);
+            yield return panel;
+        }
+    }
+}

Pilz.UI/Controls/ConfigurationManager/ConfigurationPanel.cs

@@ -0,0 +1,32 @@
+namespace Pilz.UI.Controls.ConfigurationManager;
+
+public class ConfigurationPanel : TableLayoutPanel
+{
+    private readonly List<ConfigurationEntry> entries = [];
+
+    public ConfigurationEntry CreateEntry(string name, string title)
+    {
+        return CreateEntry(name, title, null);
+    }
+
+    public ConfigurationEntry CreateEntry(string name, string title, Action? create)
+    {
+        return CreateEntry(new(name, title, ));
+    }
+
+    public ConfigurationEntry CreateEntry(ConfigurationEntry entry)
+    {
+        entries.Add(entry);
+        return entry;
+    }
+
+    internal protected void Build(ConfigurationManager manager)
+    {
+        foreach (var entry in entries)
+        {
+            var control = ;
+            entry.Listener.Initialize();
+            // ...
+        }
+    }
+}

Pilz.UI/Controls/ConfigurationManager/ConfigurationValueListener.cs

@@ -0,0 +1,15 @@
+namespace Pilz.UI.Controls.ConfigurationManager;
+
+public abstract class ConfigurationValueListener : IDisposable
+{
+    public event EventHandler? ValueChanged;
+
+    protected virtual void OnValueChanged(object sender, EventArgs e)
+    {
+        ValueChanged?.Invoke(sender, e);
+    }
+
+    internal protected abstract void Initialize(Control control);
+
+    public abstract void Dispose();
+}