Copyright/license for templates added

[rpavlik]

Is your feature request related to a problem? Please describe.
My projects follow https://reuse.software/ so I ensure that there is copyright and license info for each file in my repo. As far as I can tell, the .hbs file placed when I do cargo about init is just a part of this crate so it's probably "MIT or Apache-2.0", and same for about.toml. However, it's not clear what the copyright statement should be.

Describe the solution you'd like
It would be great if this package was REUSE compliant, but I'd be happy with just a correct copyright/license notice on the two files that init places into my repo (about.hbs and about.toml), something like this:

Copyright 2020-2023, Embark Studios
SPDX-License-Identifier: MIT or Apache-2.0

(For the toml file, which is pretty minimal and thus dubiously copyrightable anyway, CC0-1.0 would also be a reasonable option)