* faq+troubleshooting: dropdowns
- Convert FAQ and Troubleshooting pages to clickable dropdowns to improve readability.
- Add separate table of contents to Troubleshooting (for mobile users)
- Remove a couple of irrelevant troubleshooting
- Update pages that link to troubleshooting to use new headers
* a9lh-to-b9s: fix typo
homepage: read intro warning -> info
homepage: remove cfw check notices, as it is now part of get-started
homepage: add homebrew software/ports as popular cfw use
homepage: revamp guide installation to describe everything the guide does
homepage: slight reword on device compatibility
homepage: add sd card error check and ban notice
get started: remove cfw check warning
get started: add mandatory cfw and system version check, using "section" structure
get started: remove sd card error check and ban notice (moved to homepage)
get started: convert "version table" to section
get started: add notes on what inclusivity means, how software decimals work
get started: table rework - switch from/to tables to "X to X" language; change "action" to "what to do"
get started: add header for alternate methods
get started: reword alternate methods note
checking-for-cfw: add header to link to from get-started
* Restoring or updating CFW
* Checking for CFW
* Drop latest version notice on checking for CFW
* Inconsistent wording of new Restoring Updating CFW page name
