feat: Update the design for label management page (#9932)

This PR is part of the settings design update series. It updates the design for the label management page. I've made a few changes to the SettingsLayout page to reduce boilerplate code.

app/javascript/dashboard/i18n/locale/en/labelsMgmt.json

@@ -3,13 +3,18 @@
     "HEADER": "Labels",
     "HEADER_BTN_TXT": "Add label",
     "LOADING": "Fetching labels",
+    "DESCRIPTION": "Labels help you categorize and prioritize conversations and leads. You can assign a label to a conversation or contact using the side panel.",
+    "LEARN_MORE": "Learn more about labels",
     "SEARCH_404": "There are no items matching this query",
-    "SIDEBAR_TXT": "<p><b>Labels</b> <p>Labels help you to categorize conversations and prioritize them. You can assign label to a conversation from the sidepanel. <br /><br />Labels are tied to the account and can be used to create custom workflows in your organization. You can assign custom color to a label, it makes it easier to identify the label. You will be able to display the label on the sidebar to filter the conversations easily.</p>",
     "LIST": {
       "404": "There are no labels available in this account.",
       "TITLE": "Manage labels",
       "DESC": "Labels let you group the conversations together.",
-      "TABLE_HEADER": ["Name", "Description", "Color"]
+      "TABLE_HEADER": [
+        "Name",
+        "Description",
+        "Color"
+      ]
     },
     "FORM": {
       "NAME": {