forc fmt should format manifest fields with rules similar to Cargo style guide

[adlerjohn]

Currently, the manifest formatter simply orders all fields alphabetically. This should be changed to order them in a similar way to the Cargo style guide. This ordering should also be documented in The Sway Book.

https://github.com/rust-dev-tools/fmt-rfcs/blob/215291ef72823ae3a6adfad9b26334bed6707a13/guide/cargo.md

[eureka-cpu]

@cr-fuel this has to do with the toml formatter not swayfmt, but may still be relevant.