Update dependencies and build configuration

[mrnil]

Description

This PR updates project dependencies and improves build configuration with minor maintenance changes.

Changes Made

Files Modified:

• .gitignore
• ObsStudioPlugin/src/ObsPlugin/ObsStudioPlugin.csproj
• ObsStudioPlugin/src/ObsPlugin/metadata/LoupedeckPackage.yaml

Key Changes:

1. Dependency Update: Updated obs-websocket-dotnet package from version 5.0.0.3 to 5.0.1
2. Build Artifacts: Added *.lplug4 to .gitignore to exclude plugin pack files from version control
3. Package Metadata: Updated package configuration in LoupedeckPackage.yaml Changed the version number to 6.1.0 because of the change in dependencies and avoid problems with marketplace offering an update that isn't reflected in github

Before:

• obs-websocket-dotnet v5.0.0.3
• Plugin pack files potentially tracked in Git

After:

• obs-websocket-dotnet v5.0.1 (latest stable)
• Plugin pack files properly ignored

Type of Change

• Bug fix
• New feature
• Breaking change
• Dependency update
• Build/configuration improvement

Testing

• Project builds successfully
• No breaking changes in API compatibility