Enatega Customer Application : Add a pull down refresh loader on all screen while there is an internet connectivity issue.

Describe the bug
On restaurant screen and discovery screen, when the internet connection is lost these screens showing a still message 'Something went wrong'. There add a pull down refresh loader to reload the content.

To Reproduce
Steps to reproduce the behavior:

Go to 'Enatega Customer Application'
Now turn off the wifi.
See error , the screen with a still message 'Something went wrong'.
Expected behavior

Pull-Down Refresh Gesture:
Users should be able to swipe down on the screen to trigger a refresh.
A loader/spinner should appear, indicating that the app is attempting to reload content.

Retry Fetching Data:
On pull-down, the app should check the internet connection and attempt to reload the restaurant and discovery data.
Error Handling:

If the internet is restored, the content should load successfully.
If the connection is still lost, an updated message (e.g., "No internet connection. Pull down to retry.") should be displayed.

Screenshots

Screen_Recording_20250130_114834.mp4
Smartphone (please complete the following information):

Device: [e.g. Infinix Hot 50]
OS: [e.g. Android]
Browser [e.g. Application]
Version [e.g. Latest]

Run the Enatega Customer Application and reproduce the failure on the restaurant and discovery screens with Wi-Fi disabled. Start by tracing those screens' error and data-loading entry points, then verify that pull-down refresh retries the fetch, shows a loader, loads content after reconnection, and displays an updated offline message when the connection remains unavailable.

Written by the indexing model from the issue text.