Add chrono-tz and its dependencies

chrono-tz is a dependency of i3status-rs

It itself depends on phf (a collection of crates "to generate efficient lookup tables at compile time using perfect hash functions."), also included in this MR.

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• e4810627 - Remove useless vim file

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• b5775a30 - Add RFS files

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merged

mentioned in commit 87faf916