Self-host ChavaScript

[ChayimFriedman2]

That is, write the compiler itself in ChavaScript.

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While we're at it, write the README in Hebrew. Really doesn't make sense to boast about a "completely Hebrew-based implementation" and then have all of the developer docs in English.

[ChayimFriedman2]

And still you (and me) are writing this issue in English 😄.