feat: need text zoom in webview

[owencyc]

Current problem

I used this method
InAppBrowser.openWebView
to open a web page in main app, and listen some message to handle text zoom

`
import { TextZoom } from '@capacitor/text-zoom'
InAppBrowser.addListener('messageFromWebview', async (event) => {

console.log('messageFromWebview', event.detail)
switch (event.detail.action) {
  case 'getTextZoom':
    let zoom = 1.0
    if (event.detail.type === 'preferred') {
      zoom = (await TextZoom.getPreferred()).value
    } else {
      zoom = (await TextZoom.get()).value
    }
    await InAppBrowser.postMessage({
      detail: {
        zoom: zoom
      }
    })
    break
  case 'setTextZoom':
    if (event.detail.zoom && event.detail.zoom > 0) {
      await TextZoom.set({
        value: event.detail.zoom
      })
    } else {
      showToast(t('action.invalid_zoom'))
    }
    break
  default:
    await Toast.show({
      text: `Native暂不支持此行为${event.detail.action}`
    })
    break
}

})

`

Then called the method on the web page to use text zoom
window.mobileApp.postMessage({ detail: { action: 'setTextZoom' ,zoom:1.2} })
but it didn't work with inappbrowser

Preferred solution

add some option in OpenWebViewOptions, make it support text zoom

Alternative options

No response

Additional context

No response

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