[CustomHelp] Documentation Spelling and Grammar Fixes - and Addition

[TwinDragon]

Doc Overhaul

I'm doing a little bit of an overhaul of the documentation to fix some grammar and spelling to make a little more sense in English. I've also noticed the lack of stuff for chelp settings stuff other than the small notion for custom navigation icons, so I'll be writing those up, while keeping a little to the style of the original as much as I can. (course... I dunno how well I'll keep that XD)

Todo

• [x] - Grammar
• [x] - Spelling
• [x] - chelp settings
• [x] - Final Check

[npc203]

LGTM, tysm for improving the docs by A TON