Add tutorial for Llama-3-8B lora training and deployment
@chrisalexiuk-nvidia @vinhngx could you please review? ![image](https://github.com/NVIDIA/NeMo/assets/161380339/35fbb40e-d479-4bc9-a356-8eef581930d2)

There's some formatting mismatch here for the `Fig Text`.

 Adding @nealvaidya for any review comments covering the NIM part <img width="156" alt="Screenshot 2024-06-05 at 5 02 21 PM" src="https://github.com/NVIDIA/NeMo/assets/161380339/fe4af46d-6477-4249-870c-ffda6838c50c">

First notebook workin' like a charm. Approved comments
* Adds a notebook for Llama-3-8b LoRA PEFT with NeMo FW
* Adds a notebook for sending multi-LoRA inference request to NVIDIA NIM
* Adds README that includes instructions fore context and set up
