v0.6.1 — upgrade actually updates moshcode 🤘

🎸 moshcode v0.6.1 — upgrade now really updates moshcode

moshcode upgrade / update always tried to self-update in addition to engines, but it reinstalled to the default ~/.moshcode. If your moshcode lived anywhere else, the reinstall went to a different directory and the moshcode on your PATH never changed.

Fixed:

• Targets the actual running install — the self-upgrade now points the installer at the exact dir moshcode runs from (resolved from import.meta.url), so that copy updates.
• Reports the version change — moshcode 0.6.0 → 0.6.1 — restart to load it, or already at X.
• Git-checkout safe — if you run moshcode from a git clone, it skips the destructive reinstall and tells you to git pull instead of wiping your working tree.

Engines are unchanged; self runs in addition to them on a bare moshcode upgrade.