Add release notes for v2025.04.14.2340

RELEASE.md

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+# Release v2025.04.14.2340
+
+## What's New
+
+### Added
+- Port forwarding management (Get, New, Set, Remove)
+- Added unit tests for interface management
+- Improved XML documentation for all classes and methods
+
+### Changed
+- Updated IPNetwork2 library from version 2.6.618 to 3.1.764
+- Updated code to use the new namespace (System.Net) for IPNetwork2
+- Added support for .NET 8.0 and .NET 9.0
+- Made OPNSenseApiClient more testable by introducing an interface
+- Fixed warnings in test project
+- Updated version format to use datetime (yyyy.MM.dd.HHmm)
+- Organized DLLs in a subfolder for neatness
+- Used System.Reflection.Assembly::LoadBytes to avoid file lock issues
+- Removed GitHub workflow
+- Updated documentation for Tailscale integration
+- Updated Visual Studio solution documentation
+- Updated PSD1 files to include all cmdlets
+
+## Installation
+
+1. Download the release from the GitHub releases page: https://github.com/freedbygrace/PSOPNSenseAPI/releases/tag/v2025.04.14.2340
+2. Extract the zip file to a folder in your PowerShell module path
+3. Import the module: `Import-Module PSOPNSenseAPI`
+
+## Usage
+
+```powershell
+# Connect to the OPNSense firewall
+Connect-OPNSense -Server "https://firewall.example.com" -ApiKey "your_api_key" -ApiSecret "your_api_secret" -SkipCertificateCheck
+
+# Get the interfaces
+Get-OPNSenseInterface
+
+# Disconnect from the firewall
+Disconnect-OPNSense
+```
+
+For more examples, see the documentation in the `docs` folder.