fix(deps): import flatpickr CSS via JS, add flatpickr direct dep

apps/app/src/@core/components/app-form-elements/AppDateTimePicker.vue

@@ -1,5 +1,6 @@
 <script setup lang="ts">
 import FlatPickr from 'vue-flatpickr-component'
+import 'flatpickr/dist/flatpickr.css'
 import { useTheme } from 'vuetify'
 
 // @ts-expect-error There won't be declaration file for it
@@ -218,10 +219,9 @@ const elementId = computed (() => {
 
 <style lang="scss">
 @use "@core/scss/template/mixins" as templateMixins;
+@use "@core/scss/base/mixins";
 
 /* stylelint-disable no-descending-specificity */
-@use "flatpickr/dist/flatpickr.css";
-@use "@core/scss/base/mixins";
 
 .flat-picker-custom-style {
   position: absolute;