Add `instant` dependency for time in wasm build

docs: Fix build error and panic in book chapter 1

docs: Fix build errors in example chapter 3

book: Fix typos in the book chapter numbers

Update chapter_1.md

Don't depend on bevy default features

add_plugin(KayakWidgetsContextPlugin) is required for it to work (I don't know why lol)

docs: Fix typos in chapter 2

Add missing license fields to cargo manifests

Also copied from the hello_world example

Seems to be the same code as the hello_world example, so I just copied the semi-colon from there.

More release prep stuff.

Updated readme/cargo to v0.2.

Fixed font rendering when using some font sizes.

make rsx macro return the root entity

Implemented grid layout style props

Fixed texture atlas messed up from DPI.

fix sdf AA for sub-pixel text rendering

Marginally improved the main menu example.