feat: Update the design for integration page (#9825)

Combine integrations and applications page into one page. 

<img width="1182" alt="Screenshot 2024-07-23 at 3 30 51 PM"
src="https://github.com/user-attachments/assets/50920a6f-606f-44b3-b1e4-641046a14444">

Major changes:

- The app enabled?, active? checks are all moved to backend.
- The dashboard_apps integration is also now part of the apps.yml file.
- Updated the header design for the new settings pages.
- Merged the folders integrationapps and integrations. 
- Updated the copy to match the size of the card and provide clear
instruction.
- Only the list page is updated in this PR, rest of the pages are yet to
be migrated.


| Integration | Verified | 
| -- | -- |
| Dashboard Apps | ✅ | 
| Dyte | ✅ | 
| Slack | ✅ | 
| Webhooks | ✅ | 
| Dialogflow | ✅ | 
| Google Translate | ✅ | 
| OpenAI | ✅ | 
| Linear | ✅ |

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/javascript/dashboard/components/CustomBrandPolicyWrapper.vue

@@ -0,0 +1,25 @@
+<script setup>
+import { useStoreGetters } from 'dashboard/composables/store';
+import { computed } from 'vue';
+const props = defineProps({
+  showOnCustomBrandedInstance: {
+    type: Boolean,
+    default: true,
+  },
+});
+
+const getters = useStoreGetters();
+
+const isACustomBrandedInstance =
+  getters['globalConfig/isACustomBrandedInstance'];
+
+const shouldShowContent = computed(
+  () => props.showOnCustomBrandedInstance || !isACustomBrandedInstance.value
+);
+</script>
+
+<template>
+  <div v-if="shouldShowContent">
+    <slot />
+  </div>
+</template>