Complete Wii mini guide overhaul and other enhancements

[grunt22fox]

This is a complete overhaul of the Wii mini guide, and makes other improvements on the side wherever I find room for them.

CHANGELOG:

• Create instructions for nanddumper@ios and unify with BootMii into a singular guide nand-backup.md, allowing users the option to dump their NAND to an SD card or USB drive
• Redirect bootmii.md and wnd-mini.md to nand-backup.md
• Change the sidebar configuration to match the new flow of the guide
• Add the Wii mini Hacking discord server to the end of the guide
• Add instructions for BlueMii on bluebomb.md
• Restructure bluebomb.md instructions for easier readability
• Remove .html from URLs on redirect pages
• Add text to all hbc.md progression links
• Replace bootmii.md links accordingly
• Completely rewrite mini-finalizing-setup.md, adding an EULA launcher section and removing Settings Editor GUI for lack of use
• Add images as necessary, captured on real hardware
• Other miscellaneous improvements

[Zarithya]

Thanks for adding BlueMii! I would suggest adding SD card support for the target console as well, since the payload that ships with BlueMii has support for it thanks to Aep. Also, the Section II header is used twice.