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/store/modules/specs/auth/getters.spec.js

@@ -42,6 +42,26 @@ describe('#getters', () => {
     });
   });
 
+  describe('#getCurrentCustomRoleId', () => {
+    it('returns current custom role id', () => {
+      expect(
+        getters.getCurrentCustomRoleId(
+          { currentUser: { accounts: [{ id: 1, custom_role_id: 1 }] } },
+          { getCurrentAccountId: 1 }
+        )
+      ).toEqual(1);
+    });
+
+    it('returns undefined if account is not available', () => {
+      expect(
+        getters.getCurrentCustomRoleId(
+          { currentUser: { accounts: [{ id: 1, custom_role_id: 1 }] } },
+          { getCurrentAccountId: 2 }
+        )
+      ).toEqual(undefined);
+    });
+  });
+
   describe('#getCurrentUserAvailability', () => {
     it('returns correct availability status', () => {
       expect(