chore: Custom Roles to manage permissions [ UI ] (#9865)

In admin settings, this Pr will add the UI for managing custom roles (
ref: https://github.com/chatwoot/chatwoot/pull/9995 ). It also handles
the routing logic changes to accommodate fine-tuned permissions.

---------

Co-authored-by: Pranav <pranavrajs@gmail.com>
Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: iamsivin <iamsivin@gmail.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

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

@@ -145,11 +145,7 @@
       },
       "AVAILABILITY": {
         "LABEL": "Availability",
-        "STATUSES_LIST": [
-          "Online",
-          "Busy",
-          "Offline"
-        ],
+        "STATUSES_LIST": ["Online", "Busy", "Offline"],
         "SET_AVAILABILITY_SUCCESS": "Availability has been set successfully",
         "SET_AVAILABILITY_ERROR": "Couldn't set availability, please try again"
       },
@@ -277,6 +273,7 @@
     "REPORTS_TEAM": "Team",
     "SET_AVAILABILITY_TITLE": "Set yourself as",
     "SLA": "SLA",
+    "CUSTOM_ROLES": "Custom Roles",
     "BETA": "Beta",
     "REPORTS_OVERVIEW": "Overview",
     "REAUTHORIZE": "Your inbox connection has expired, please reconnect\n to continue receiving and sending messages",