Hi Akash,

I think you better have a look at these links (as well):
https://www.zephyrproject.org/zephyr-project-announces-openthread-first-thread-protocol-implementation-integrate-zephyr-rtos/
https://openthread.io/platforms/zephyr

Probably you want a hybride setup BLE mesh towards Thread (OpenThread) network..., I think some puzzling between network technologies is required at this moment. 
Maybe a little bit too soon to come up with the examples you would love to see I'm afraid. 

Best regards,
Frank