Add Hare implementation

[einsiedlerspiel]

mal implemented in pure hare https://harelang.org/ using only its standard library

There's no GC, I try to clean up any non persistent allocations but really for the most part I'm just leaking all the memory.
Metadata implementation is incomplete and only implemented for user defined functions and hashmaps, for everything else I used native types, adding meta data would probably require completely reworking that.

There's lots of things to clean up and add checks for, but I won't get to that any time soon so I thought I'll just send the PR now, before I'll never do it.

Had lot's of fun with the challenge, thanks for creating it!

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