[REQUEST] Add Llama 3 Instruct chat template

[ddh0]

Hi!

I've just started using Chat UI and I think it would be helpful to have the Llama 3 Instruct chat template + system prompt listed in PROMPTS.md so it can be easily adopted by users. I would open a PR but I don't understand how the formatting works. :)

Thank you!

[acoppola16]

I'm unable to fork the repo and push a commit ATM but until then @ddh0 give this a try.

<|begin_of_text|><|start_header_id|>system<|end_header_id|>\n\n{{preprompt}}<|eot_id|>{{#each messages}}{{#ifUser}}<|start_header_id|>user<|end_header_id|>\n\n{{content}}<|eot_id|><|start_header_id|>assistant<|end_header_id|>{{/ifUser}}{{#ifAssistant}}{{content}}<|eot_id|>{{/ifAssistant}}{{/each}}

[Cucunnber]

I'm unable to fork the repo and push a commit ATM but until then @ddh0 give this a try.

<|begin_of_text|><|start_header_id|>system<|end_header_id|>\n\n{{preprompt}}<|eot_id|>{{#each messages}}{{#ifUser}}<|start_header_id|>user<|end_header_id|>\n\n{{content}}<|eot_id|><|start_header_id|>assistant<|end_header_id|>{{/ifUser}}{{#ifAssistant}}{{content}}<|eot_id|>{{/ifAssistant}}{{/each}}

Thx, it's useful.