[feat] Add alignment guidelines for centering the launcher

[MrTartuf0]

Describe the problem

I'm always frustrated when trying to position the kunkun launcher in the center of my screen. Currently, there is no visual guidance to help align the launcher perfectly in the center, making it difficult to achieve a balanced and aesthetically pleasing placement. This creates an inconsistent user experience compared to other launchers like Raycast that provide visual alignment guides.

Describe the solution you'd like

I would like kunkun to implement alignment guidelines that appear when moving the launcher window, similar to Raycast's feature. These guidelines would:

Show horizontal and vertical centerlines when the launcher approaches the center of the screen
Provide visual snapping indicators when the launcher aligns with the center
Allow for precise positioning without guesswork
Make it easier to maintain a consistent, centered UI across different monitor configurations

Alternatives considered

Manually positioning the launcher through trial and error (current approach, but time-consuming and imprecise)
Adding a "Center" button in settings that automatically positions the launcher
Implementing keyboard shortcuts to nudge the launcher position by small increments, or snaps into position

Additional context

No response

Contributes

• I am willing to submit a PR to implement this feature

Searched

• I have searched for similar issues and found none