feat(notifications): include repository name and subject type in native Windows OS notifications

[emre155]

Fixes #3026.

On Windows 11, native OS notifications previously set the notification title to an empty string, preventing users from seeing which repository a notification belonged to in the Notification Center.

This PR removes the empty-string override on Windows so that notification.repository.fullName is consistently displayed as the notification title across all operating systems. Additionally, it appends the notification subject type (e.g. PullRequest, Issue) to the body for clearer context at a glance.

[setchy]

@emre155 - are you able to share some before and after screenshots please 🙏

[emre155]

Hi @setchy! Thanks for reviewing the PR. I'm currently working from a macOS environment, so I don't have immediate access to a Windows 11 machine to capture a before/after screenshot of the native Windows Notification Center.

However, the essence of the change is that previously, the title field for Windows notifications was overridden with an empty string, which resulted in the repository name (notification.repository.fullName) being omitted entirely from the notification banner. By removing this Windows-specific override, the repository name will now correctly populate the notification title on Windows, bringing it to parity with how it displays on macOS and Linux. Additionally, the notification body now appends the subject type (e.g. Issue, PullRequest) for clearer context at a glance.

If anyone with a Windows setup can pull this branch and verify the notification visuals, I'd really appreciate it!

[setchy]

Understood, but we've had that condition there for quite some time, presumably for good (Windows) reasons...

[setchy]

pending Windows before/after