Update/docs: FAQs, CLI Installation, remove YBX references

[masterzorgon]

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[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
marginfi-landing-page	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 12, 2025 8:35am
marginfi-v2-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 12, 2025 8:35am
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marginfi-v2-ui	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 12, 2025 8:35am

[alwaysmeticulous]

✅ Meticulous spotted zero visual differences across 199 screens tested: view results.

Meticulous simulated ~4 hours of user flows but tested none of the executable lines edited in your PR. If your PR does not modify your frontend this is expected. If this is a new feature or Meticulous was recently introduced then Meticulous will generate tests to cover your code in the coming days¹.

_{1. If you wish to increase coverage immediately you can do so by interacting with your feature on localhost.}

_{Expected differences? Click here. Last updated for commit f8d7051. This comment will update as new commits are pushed.}