Make SystemTime available in both native and wasm

[cBournhonesque]

Objective

Instant and Duration from the instant crate are exposed in bevy_utils to have a single abstraction for native/wasm.
It would be useful to have the same thing for SystemTime.

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Changelog

Added

• bevy_utils now re-exposes the instant::SystemTime struct

[alice-i-cecile]

Edited your post to add a link to the SystemTime docs :)

[doonv]

#10702 has overridden the changes that this PR made:

- pub use instant::{Duration, Instant, SystemTime};
+ pub use web_time::{Duration, Instant};

Should I make a PR to bring back SystemTime?

[cBournhonesque]

#10702 has overridden the changes that this PR made:

- pub use instant::{Duration, Instant, SystemTime};
+ pub use web_time::{Duration, Instant};

Should I make a PR to bring back SystemTime?

Ah didn't know that instant was unmaintained; yes could you please add SystemTime ? I would need it for a library I'm working on

[doonv]

Ah alright.