feat(timezone)!: improves how pace handles timezones #538

Job	Run time
Rustfmt	6s
Clippy (stable)	35s
Build docs (stable, macos-latest)	28s
Clippy (Future) (beta)	22s
Build docs (stable, ubuntu-latest)	19s
Clippy (Future) (nightly)	22s
Check MSRV (pace-rs, 1.74.1)	2m 30s
Build docs (stable, windows-latest)	1m 28s
Check MSRV (pace_core, 1.74.1)	1m 56s
Check MSRV (pace_cli, 1.74.1)	1m 56s
Test (stable, macos-latest)	2m 45s
Test (stable, ubuntu-latest)	1m 41s
Test (stable, windows-latest)	4m 33s
ubuntu / stable / features	2m 19s
Test (beta, macos-latest)	3m 0s
Test (beta, ubuntu-latest)	1m 45s
Test (beta, windows-latest)	3m 37s
Result (CI)	1s
	29m 43s

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