Add support for multiple clocks with different time zones

[hootanht]

Fixes #32

Add support for multiple clocks with different time zones.

• src/clock/app.clock.tsx
  • Update to support multiple clocks with different time zones.
  • Modify the useEffect hook to handle multiple clocks.
  • Add a new state to manage multiple clocks.
• src/setting/pages/clock/clock.setting.tsx
  • Update to allow setting multiple time zones for the clocks.
  • Modify the useEffect hook to handle multiple time zones.
  • Add a new state to manage multiple time zones.
  • Add a button to add new clocks.
• electron/main.ts
  • Update to initialize multiple clock windows.
  • Modify the onAppReady function to handle multiple clocks.
  • Add a new function to create multiple clock windows.
• electron/store.ts
  • Update to define settings for multiple clock widgets.
  • Modify the ClockSettingStore interface to handle multiple clocks.
  • Add a new state to manage multiple clock settings.

[sajjadmrx]

thanks for taking the time. but adding multiple time zones like this isn't a good idea. It will likely introduce many bugs into the application. A better approach would be to ask the user to select multiple time zones by default and provide templates that support multiple time zones.