Document delegate mocking feature

[Copilot]

Delegate mocking (Action, Func, custom delegates) was implemented but undocumented as a standalone feature.

Changes

• Setup documentation - Added "Delegate Setup" section covering SetupMock.Delegate() with examples for Action, Func, and custom delegates including ref/out parameters
• Verification documentation - Added "Delegates" section covering VerifyMock.Invoked() for delegate verification with parameter matching
• Documentation consistency - Applied changes to both README.md and Docs/pages/ to maintain sync

Example

// Mock and setup a custom delegate
public delegate int Calculate(int x, string operation);
Calculate calculator = Mock.Create<Calculate>();
calculator.SetupMock.Delegate(It.IsAny<int>(), It.Is("add"))
    .Returns((x, operation) => x + 10);

// Use and verify
int result = calculator(5, "add");  // returns 15
calculator.VerifyMock.Invoked(It.IsAny<int>(), It.Is("add")).Once();

Original prompt

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This section details on the original issue you should resolve

<issue_title>Document delegate mocking feature</issue_title>
<issue_description>## Description

While delegates are mentioned in the main example, delegate mocking is not properly documented as a standalone feature.

Missing Documentation

• Mock Action<T>, Func<T>, and custom delegates
• SetupMock.Delegate() for setup
• VerifyMock.Invoked() for delegate verification
• Full parameter matching support for delegates

Suggested Documentation

Add a new section titled "Mocking Delegates":

### Mocking Delegates

Mockolate supports mocking delegates including `Action<T>`, `Func<T>`, and custom delegates:

```csharp
// Create a mock delegate
var myDelegate = Mock.Create<Action<string, int>>();

// Setup the delegate
myDelegate.SetupMock.Delegate(It.Is(\"Dark\"), It.IsAny<int>())
    .Do((type, amount) => Console.WriteLine($\"Dispensed {amount} {type}\"));

// Invoke the delegate
myDelegate(\"Dark\", 5);

// Verify invocation
myDelegate.VerifyMock.Invoked(It.Is(\"Dark\"), It.Is(5)).Once();

Custom delegates are also supported:

var customDelegate = Mock.Create<ChocolateDispensedDelegate>();
customDelegate.SetupMock.Delegate(It.IsAny<string>(), It.IsAny<int>())
    .Do((type, amount) => { /* handler */ });

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

• Fixes Document delegate mocking feature #413

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[vbreuss]

Obsolete by #428