WindowKiller 2025.07.30.5

Add Delete key support to terminate window processes

- Added `TriggerKillProcess` methods in `Form1.cs` and `MainWindowHandler.cs` to trigger process termination from outside the form boundaries.
- Updated `GlobalKeyboardHook` to trigger this functionality when the `Delete` key is pressed and the main window is open.
- Modified `README.md` to document the new feature.

WindowKiller 2025.07.30.4

Improve transparency, dialogs, notifications, and docs

- Rephrased confirmation dialog in `KillProcess` for clarity.
- Added a startup balloon tip notification in `Program.cs`.
- Enhanced `README.md` with better formatting, clearer descriptions, detailed usage steps, and consistent punctuation.

WindowKiller 2025.07.30.3

Refactor app logic and improve UX

- Updated GitHub release workflow to include repo name in tag.
- Changed form title to "Window Killer" in `Form1.Designer.cs`.
- Reformatted confirmation dialog for better readability.
- Added mutex to enforce single instance of the app.
- Refactored notification bar icon setup into `SetupNotificationBarIcon`.
  - Added context menu with "Quit" option and title label.
- Updated README with instructions for exiting the app.
- Performed general code cleanup for better maintainability.