Add local mode to Qiskit Code Assistant Guide

[vabarbosa]

this PR adds instruction for running the Qiskit Code Assistant locally.

Fixes #2251

this is a rough draft so feel free to edit and feedback is greatly appreciated.

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CC @cbjuan

[qiskit-bot]

One or more of the following people are relevant to this code:

• @abbycross
• @beckykd
• cbjuan

[cbjuan]

It’s a good start! Some comments. Most of them are to distinguish the model name vs the service name and to reinforce the name for the model instead of using a generic way to refer to it

[vabarbosa]

It’s a good start! Some comments. Most of them are to distinguish the model name vs the service name and to reinforce the name for the model instead of using a generic way to refer to it

thank you 👍🏽

[vabarbosa]

Nice page! I added copyediting suggestions.

thank you @abbycross. i appreciate the suggestions. there is just one comment that i had more clarification for.