feat: Actually land: Enhanced token management with proactive validation and expiration support

[passsy]

Building on top of #117

tested it all day, it works fine :)

The versioning and breaking changes (like raising min-sdk) need to be considered

[felangel]

Thanks I'll take a closer look later either today or tomorrow and try to get this merged. Really appreciate you taking the time to ship these improvements 💯

[felangel]

Also @passsy curious what your thoughts are on the changes in https://github.com/felangel/fresh/pull/112 since that branch includes a much smaller diff while still attempting to address #110? We have some users already using that branch in production successfully.

[passsy]

I much preferred expiresAt being part of the Token instead of isExpired on the TokenStorage

[StarProxima]

@passsy Hi, can you go back to that?