eric/m-code-64: 64 bits m-code virtual machine with interpreter and conrsion program @ v1.0-mc64

Eric Streit 75954dc51f docs/MC4 reorganization: per-project docs/ and MC4/ folders, runners use MC4/		il y a 3 semaines
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SESSION.md	75954dc51f docs/MC4 reorganization: per-project docs/ and MC4/ folders, runners use MC4/	il y a 3 semaines
m-code-summary-64.md	83b9f7c6b2 second commit	il y a 4 semaines
m-code-summary.md	83b9f7c6b2 second commit	il y a 4 semaines
mc64-spec.md	b0c26bb9f4 step2.1: rename 64-bit images .MCD -> .MC4 per spec sections 8 and 14	il y a 3 semaines
session-summary.md	716e1c3038 session: save state through step11 (157/157, showcases 157/83/168/225)	il y a 3 semaines