0.30.4 beta

Please run Copilot for Xcode.app once and restart Xcode to complete the update.

Beta 2

• Fix a bug that causes deadlock in the main actor
• Some tweaks of the previous changes

Beta 1

• Improve the performance of the widgets.
• Fixed a bug that the widgets would update their location on irrelevant events. May be related to #432
• Add throttling to avoid Xcode sending a large amount of notifications in a short time.
• The above changes may also reduce the input lags.