The search page should be the home page

[sampsyo]

Currently, the home page at riscv.fyi is the big list of instructions. You can scroll down to the bottom to get to a somewhat more useful page with a search box where you can easily find the instruction you're looking for.

We should probably just make the search page the home page. We need to decide whether we want to keep around the big long list of extensions in any capacity.

[sampsyo]

@Sayeem2004 points out on Slack that we can probably do better than this and redesign a more useful front page from first principles. Here are some of @Sayeem2004's thoughts:

I think we should have a search bar, but not the huge list of instructions as it is

[…]

we should try to hardcode some of the extensions into dropdowns like maybe I, B, and M becomes “Basic ISA”, all the vector instructions can go in a dropdown, etc. Whatever instructions can either go outside the dropdowns at the bottom, or in an “etc” dropdown. And we should definitely have the Basic ISA drop down appear the highest, and be open.

Within each dropdown we can make have a bolded “Extension” which links to a more detailed extension page (with all the command and synopsis’s as they are now. Then we can also list a bunch of hyperlinks like [I Extension]: [add], [addi]  (brackets representing hyperlinks) that go directly to the instruction page instead of the extension page. Also to make sure that if someone Ctrl-F’s from an instruction it pops up (and opens the dropdown somehow?)

Then with a search bar at the top we can filter by drop down instead of by each individual extension (that huge filtering box looks scary). And when you search for an instruction (and press enter), maybe it opens up the appropriate dropdowns and highlights the possible instructions you are referencing (not sure about this last point as it might not look good). Mainly i just don’t the search page should be separate and it doens’t look good right now (the inst - extension)  list on the search page annoys me for some reason.

Basically, let's try to think about what the most common things to want when you land on the homepage are, and design a homepage around making those easy.