Make Keyboard Shortcuts more Discoverable

[fallaciousreasoning]

Currently, we have a lot of shortcuts but it's hard for user's to discover them. We should add a page where it's possible to view all available shortcuts.

This is a prerequisite for #354, where we want to make the shortcuts configurable.

[LaurenWags]

@fallaciousreasoning is this issue solely to expose the page via the flag mentioned in brave/brave-core#16845? Asking as my brave://commands does not look as pictured so I want to be sure I'm checking the correct thing here.

Using 1.50.91 Chromium: 111.0.5563.64 (Official Build) beta (x86_64):

[fallaciousreasoning]

Interesting - I think it should be showing keyboard shortcuts too (it definitely does on Linux)

I've got another PR which is going to make a bunch of changes to this, might be worth holding off on this till it lands
brave/brave-core#17296

[LaurenWags]

@fallaciousreasoning I see, unless that's going to be uplifted to 1.50.x, we still need to figure out what we're doing for this issue. Perhaps this one should be QA/No - esp if it's not fully baked?

wdyt @rebron?

[fallaciousreasoning]

QA/No is probably a good call - I'll update it 😄 Sorry about that!

[LaurenWags]

thanks @fallaciousreasoning 😄