Mostly just formatting fixes with a few grammatical changes.
Two real notable changes:
- Removed references to SkGLCanvas from Tips & FAQ and replaced with
references to `SkDevice` and `SkSurface`.
- Deleted deprecated "Quick Start Guides" folder
Docs-Preview: https://skia.org/?cl=92361
Bug: skia:
Change-Id: Ief790b1c2bae8fe0e39aa8d66c79f80560d18c9e
Reviewed-on: https://skia-review.googlesource.com/92361
Reviewed-by: Heather Miller <hcm@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
