Feat: separate loaded list per Revit version

[chuongmep]

Added a setting "Separate loaded list per Revit version" to avoid conflicts when multiple Revit instances are running on the same machine. Now correctly utilizes ExternalCommandData.Application.Application.VersionNumber when configured.

---

PR created automatically by Jules for task 5325653799585024780 started by @chuongmep

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.

[chuongmep]

No, please don't use System.Resources.Extensions, I need maintenance support version with .NET framework <= 4.8.1 as well

[google-labs-jules]

No, please don't use System.Resources.Extensions, I need maintenance support version with .NET framework <= 4.8.1 as well

I have removed the changes to System.Resources.Extensions in RevitAddinManager.csproj to maintain support for .NET framework <= 4.8.1. Instead of using VersionChecker.CurrentVersion which returns the AddInManager version, I am now correctly capturing the Revit Host version through the ExternalCommandData.Application.Application.VersionNumber and injecting it into the AddinManager constructor so that GetIniFilePaths() constructs the separate path based on the Revit version when the setting is enabled.