chore: bump pi to @earendil-works/pi-coding-agent ^0.78.1 (#3)

* chore: bump pi to @earendil-works/pi-coding-agent ^0.78.1

Switch the pi coding agent dependency from @mariozechner/pi-coding-agent
^0.73.1 to the renamed @earendil-works/pi-coding-agent ^0.78.1.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* chore: update pi import to @earendil-works scope

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: benvinegar