Fix event subscriptions for certain parameter types on .NET 9

[breyed]

For .NET 9 (and perhap earlier versions), events from SubscribeToEvents passed incorrect parameters. For example, a null string was becoming a quotation mark. To fix it, I replaced the existing array marshalling workaround with an ArrayList. It's also less code and probably faster.

[Copilot]

Pull Request Overview

This PR fixes event parameter marshalling issues on .NET 9 where certain parameter types (like null strings) were being incorrectly converted. The fix replaces an array-based workaround with ArrayList to properly handle parameter serialization.

• Replaces object[] with ArrayList for event parameters in C# code
• Simplifies parameter iteration logic in FoxPro code by directly accessing ArrayList items
• Adds null check for handler object to prevent errors when unsubscribed

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
DotnetBridge/Utilities/EventSubscriber.cs	Changes RaisedEvent.Params from object[] to ArrayList and updates parameter creation logic
Distribution/wwDotnetBridge.PRG	Simplifies parameter handling by directly accessing ArrayList items instead of creating dynamic properties

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