VMO-7115 wip

[bulatgab]

Todo:

• fix this on this lines

supportedModes: this.activeFlow.supported_modes,
supportedLanguages: this.activeFlow.languages,

• test

Comment:
I've tried doing it more elegantly (?) like this, but I wasn't able to access store.dispatch this way:

// in `InteractionDesigner.created()`
watchers.forEach(({getter, callback, options}) => this.$store.watch(getter, callback, options))

// in `store/validation/index.ts`
export const watchers: StoreWatcherParams<IRootState, unknown>[] = [
  {
    getter: (_, rootGetters) => rootGetters['activeFlow'],
    callback: activeFlow => this.debounceFlowValidation({newFlow}),
    options: {deep: true, immediate: true}
  },
]

type StoreWatcherParams<S, T> = {
  getter: (state: S, getters: any) => T,
  callback: (value: T, oldValue: T) => void,
  options?: WatchOptions,
}