Keep the project board in step with commits

A post-commit hook moves the cards a commit references (Closes #N to
Fait, other #N to En cours) and adds a closed Fait card for an
unreferenced commit on main. A post-rewrite hook carries the commit
hashes over amends and rebases. Enable with
git config core.hooksPath .githooks.

[no-card]

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.githooks/post-rewrite

@@ -0,0 +1,3 @@
+#!/bin/sh
+# Carries the board's commit hashes over amends and rebases (scripts/project-board.mjs).
+exec node "$(git rev-parse --show-toplevel)/scripts/project-board.mjs" rewrite