Enhance UI and add admin privilege checks and add information about sys.

[Miiraak]

• Fix #5

• Fix #4

• MainForm.Designer.cs: Added labels and group box for Windows info, adjusted layout, and updated InitializeComponent.

• MainForm.cs: Added methods and variables for Windows info, updated constructor, improved error handling, and enhanced activation handling.

• PLACT.csproj: Updated version to 1.0.2, added manifest, and updated assembly info.

• Program.cs: Added methods for admin check and relaunch, updated Main method.

• plact.manifest: Added manifest for admin privileges and compatibility settings.

These changes improve the UI to display detailed Windows information and ensure the application runs with necessary privileges.