Transloco empty strings support

[rraziel]

Is your feature related to a specific framework or general for this extension
Transloco

Is your feature request related to a problem? Please describe.
Transloco allows having empty strings for translations, using

provideTransloco({
  missingHandler({
    allowEmpty: true
  })
})

Without the option, the translation key is displayed (just like with i18n-ally).

Describe the solution you'd like
A setting that can be added to .vscode/settings.json, e.g. i18n-ally.transloco.allowEmpty so that i18n-ally doesn't show the translation as missing.

Additional context