* Fix minor typo in "General FAQ"
"want to do brand it with QMK" -> "want to brand it with QMK"
* Reword some of "Debugging FAQ" & "Miscellaneous FAQ".
Mostly grammatical wording of some parts and missing capitalization
* first pass
* firmware firmware?
* Split out debug + testing docs
* tidy up duplicate css
* Add extra info to debug example
Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>