Replace `chrono` crate with `time` crate

[deciduously]

The chrono crate should be completely removed from the codebase and replaced with time.

[AdeilH]

Hi Can I pick this up?

[nitsky]

@AdeilH yes!

[AdeilH]

Hi Apologies but is this a high priority task? My current personal machine can't really build this program and hangs up i have tried multiple times and can't get past the build stage hoping to get a new machine in a month if this can wait.

[deciduously]

Hi @AdeilH - Tangram is definitely a large build, and unfortunately hardware that can build the project in a reasonable time will be a prerequisite for working with the code. I'll unassign you for now, and if your new machine handles it better, feel free to jump back in.

[hedonhermdev]

Hi, I would like to work on this issue if no one else is. Can I take this up?