Search bar for forc-doc

[sdankel]

Description

Closes #3480

A simple search bar for forc-doc. It uses a case-insensitive search of item names, across the library and all of its dependencies. Names in the search results are highlighted similar to docs.rs.

Checklist

• I have linked to any relevant issues.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation where relevant (API docs, the reference, and the Sway book).
• I have added tests that prove my fix is effective or that my feature works.
• I have added (or requested a maintainer to add) the necessary Breaking* or New Feature labels where relevant.
• I have done my best to ensure that my PR adheres to the Fuel Labs Code Review Standards.
• I have requested a review from the relevant team or maintainers.

[JoshuaBatty]

Nice this is a great start! Great to finally see a search bar in forc-doc!
Pulled down and tested locally. Just wondering if we can mimic docs.rs behaviour in 2 other places.

docs.rs highlights the final type according to it's semantic representation. Is this possible with the current set up of forc-doc or do we need to share some logic from LSP to enable this?

Finally, can we have the search results update on each keystroke rather than on-enter?

[JoshuaBatty]

Very cool :) Thanks!

[kayagokalp]

lgtm