Add Frameless and Maximize Window Support to Multi-Window Desktop Plugin

[nnovation]

I’ve modified your Multi Window Desktop plugin to add support for frameless windows and maximize/restore functionality.
These enhancements allow developers to create cleaner, fully customized multi-window experiences without default OS borders.

I’d love to contribute these improvements back to your repository if you’re open to collaboration.

Thanks for your great work on this plugin!
Nailesh Parmar

[isoos]

@nnovation: this repository is for the pub.dev site and not for individual packages. Please use the repository link on the package's page to get in contact with the package authors.