Add destructors to standard library objects

[raynei86]

Summary

Many standard library objects and containers still require close() to be called manually.
This is mostly alleviated with defer, but you still need to remember to close it.
This also isn't consistent with how some parallelization related modules have a =destroy hook.

Description

Provide destructors for standard library modules so cleanup is done automatically.
This should also simplify many parsers in the standard library since they all use std/streams and need to call close(); they also have many short functions that just opens a stream, then closes it two lines afterwards. Having a defer there breaks the succinct flow.

Alternatives

No response

Examples

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Backwards Compatibility

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Links

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[Araq]

That's a good idea but should be moved to the RFCs repo.

[raynei86]

Got it, moved issue to here.