fix: theme change sync issue

Walkthrough

The changes in this pull request focus on the View component and the chooseTheme function within the packages/extension-polkagate directory. The View component has been enhanced with improved state management using React hooks, specifically useState and useEffect, to handle theme changes based on local storage events. Additionally, the chooseTheme function has a minor formatting change in its declaration. Overall, these modifications streamline the theme management process in the extension.

Changes

File Path	Change Summary
`packages/extension-polkagate/src/components/View.tsx`	- Reorganized imports and expanded `React` import. - Updated `View` function signature spacing. - Changed state management to use `useState` directly. - Added `useEffect` for handling storage events related to theme. - Introduced `useMemo` for `colorMode` and `theme` variables. - Modified `BodyTheme` type declaration.
`packages/extension-polkagate/src/components/chooseTheme.ts`	- Adjusted function declaration spacing for `chooseTheme`.

Assessment against linked issues

Objective	Addressed	Explanation
Change the theme from extension won't change the theme on FS (#1615)	✅

Poem

🐰 In the land of themes, so bright and fair,
A toggle here, a change over there.
With hooks and states, we dance and play,
Light and dark, come what may!
Storage events, we heed their call,
A rabbit's joy in themes for all! 🌈

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PolkaGate / extension