Migrate firmware part of docs to MrChromebox's website

[sadlerm4]

Closes #178

This also serves as preparation for including documentation for ARM devices, as the project expands to support not only devices supported by MrChromebox's firmware.

TO DO:

• supported-devices.md: remove WP method column, combine RW_LEGACY/full ROM into one new "MrChromebox firmware" column
• supported-devices.md: layout restructuring
• faq.md: clean up
• faq.md: remove firmware-related questions already answered on MrChromebox's website
• fix site-wide navigation (page order)
• make each page's sidebar title consistent with h1
• move firmware/ti50-ap-ro.md to MrChromebox's website (Migrate instructions for disabling RO FW WP on Ti50 Chromebooks from chrultrabook docs MrChromebox/website#10)
• rewrite firmware/index.md, merge current content with system-info.md
• remove firmware, unbricking
• expand reverting to include instructions on how to remove Linux if dual booting (crap), explicitly state that if you're using RWL you are already on stock firmware, no reflashing necessary

additional:

• use local images for WP method on MrChromebox's site
• change landing page title
• remove debian as a supported distro (make tree happy v3)
• update processor eligibility for CoolStar driver AUE discount

[sadlerm4]

Reading is hard for people.

[ethanaobrien]

True true, though the only issue is if one place gets updated and the other doesn't. Maybe add an html comment on the installing Linux page saying suggestions are also on this page

And to note, if both fedora and ultramine are noted here, both arch and endeavoros should be noted here. Otherwise ultramine seems a little out of place when we're noting the fedora based distro, but not the arch based distro. (I overcomplicated this comment)

[sadlerm4]

Yep I see what you mean, also apparently the list itself may change...

I don't remember why EndeavourOS was added in the first place, I think maybe I based the original list off what distros the project members use? WeirdTreeThing used to use EndeavourOS on at least one Chromebook (maybe still does), elly uses Fedora, and MrChromebox uses Pop!_OS (afaik). Ultramarine is included because it's the target of a specific Chromebook edition.

[ninelore]

Its simply a list of whats proven to be reliably working

[sadlerm4]

Are there any contributors who use Tumbleweed on a Chromebook, or is it proven to be reliably working some other way?

[WeirdTreeThing]

#202 fixes "fix site-wide navigation (page order)"

[ninelore]

superseded by #231