chore: Added License and Workspace Managers in SwiftUI

[mherrera53]

Pull Request Description

Summary: This pull request includes new features and improvements related to the LicenseManager and WorkspaceManager in SwiftUI. It also introduces a new license tier enum and workspace template struct.

Key Changes:

• A new LicenseManager was implemented which is responsible for validating licenses, checking license statuses etc. This class is part of the GitMac application's License configuration (contains device-specific Pro activation).
• The WorkspaceManager was also added to handle different workspaces in a more efficient way. It introduces new changes in Xcode project files as well.

Considerations:

• This change might introduce some breaking changes in the existing code that uses these classes, hence they need to be thoroughly tested before merging.
• The LicenseManager class requires further unit tests and integration tests for ensuring its correctness and reliability.

Testing Notes:

• Unit Tests are required to ensure individual components of the new LicenseManager class operate as expected.
• Integration Tests are needed to validate the overall functionality of the system after these changes have been implemented.