rust: add abstraction for vlc_tick_t and date_t

This MR is based on !3982 (merged), I will rebase it on top when the other one is merged. Nevertheless the MR can still be reviewed.

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Adds abstractions for vlc_tick_t and date_t found in vlc_tick.h. The abstraction crate is vlcrs-tick with the raw bindings being generated from vlc_tick.h and outputted in vlcrs-tick.

The types added are:

• vlc_tick_t -> Tick (with each time unit having it's own unique type)
• date_t -> Date