Produce version 0.1.0: single-file exports and make package

Re-read the specification (§12, §13, §15) before producing the game:
Linux and Windows are the target platforms for this version. Embed
the PCK for one executable per platform, add config/version, and add
`make package` which re-exports from scratch and builds
dist/*.tar.gz, dist/*.zip and SHA256SUMS (executable + LICENSE +
READMEs + CREDITS + a short notice). READMEs updated to the real
status. Known gaps against the spec are listed in decisions.md.

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

tools/package.sh

@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+# Produit les archives distribuables dans dist/ : un executable unique par
+# plateforme (PCK embarque) + licence, credits et notice. Reexporte toujours
+# depuis zero pour ne jamais empaqueter un build perime.
+set -euo pipefail
+
+cd "$(dirname "$0")/.."
+
+VERSION="$(sed -n 's/^config\/version="\(.*\)"/\1/p' project.godot)"
+[ -n "${VERSION}" ] || { echo "config/version absent de project.godot" >&2; exit 1; }
+
+rm -rf build dist
+make export-linux export-windows >/dev/null
+
+write_notice() {
+    cat > "$1/LISEZMOI.txt" <<NOTICE
+Les Aventuriers des mots ${VERSION}
+Jeu éducatif de français CE1-CE2, hors ligne.
+
+Lancer : $2
+Aucune installation ni connexion Internet n'est nécessaire.
+
+Les profils et la progression sont enregistrés localement :
+  $3
+Sauvegarder ce dossier suffit à conserver la progression.
+
+Les voix des dictées sont provisoires (synthèse vocale) ; voir CREDITS.md.
+Licence : GNU AGPL v3 (fichier LICENSE). Code source : voir README.md.
+NOTICE
+}
+
+stage() {
+    local name="$1" src="$2" launch="$3" saves="$4"
+    local dir="dist/${name}"
+    mkdir -p "${dir}"
+    cp "${src}" "${dir}/"
+    for doc in LICENSE README.md README-EN.md assets/CREDITS.md; do
+        [ -s "${doc}" ] || { echo "${doc} est vide : paquet refuse" >&2; exit 1; }
+    done
+    cp LICENSE README.md README-EN.md "${dir}/"
+    cp assets/CREDITS.md "${dir}/CREDITS.md"
+    write_notice "${dir}" "${launch}" "${saves}"
+}
+
+LINUX="aventuriers-des-mots-${VERSION}-linux-x86_64"
+WINDOWS="aventuriers-des-mots-${VERSION}-windows-x86_64"
+
+stage "${LINUX}" build/linux/aventuriers_des_mots.x86_64 \
+    "./aventuriers_des_mots.x86_64 (au besoin : chmod +x aventuriers_des_mots.x86_64)" \
+    "~/.local/share/godot/app_userdata/Les Aventuriers des mots/"
+stage "${WINDOWS}" build/windows/aventuriers_des_mots.exe \
+    "double-clic sur aventuriers_des_mots.exe" \
+    "%APPDATA%\\Godot\\app_userdata\\Les Aventuriers des mots\\"
+
+(cd dist && tar czf "${LINUX}.tar.gz" "${LINUX}" && zip -qr "${WINDOWS}.zip" "${WINDOWS}")
+(cd dist && sha256sum "${LINUX}.tar.gz" "${WINDOWS}.zip" > SHA256SUMS)
+rm -rf "dist/${LINUX}" "dist/${WINDOWS}"
+ls -lh dist