Enhance Search Functionality

[bitzoic]

One cannot filter what section the search is part of. When searching "asset", the only sections that show are Fuel wallet and Fuel TS SDK when I need Sway.

The std-lib also does not show up in the search. Looking up transfer does not yield the std-lib's transfer function. Something like "Storagebytes" yields 0 results.

[petertonysmith94]

@FuelLabs/devrel has this been done now?