chore: scaffold tracks and tooling

Co-Authored-By: Claude Opus 5.5 <[email protected]>

scripts/verify.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# Usage: scripts/verify.sh <js|scala|fsharp>
+# Copies the repo to a temp dir, swaps src/ for solutions/, runs the track's full test suite.
+set -euo pipefail
+track="${1:?usage: verify.sh <js|scala|fsharp>}"
+case "$track" in js|scala|fsharp) ;; *) echo "unknown track: $track" >&2; exit 2;; esac
+repo="$(cd "$(dirname "$0")/.." && pwd)"
+tmp="$(mktemp -d)"
+trap 'rm -rf "$tmp"' EXIT
+tar -C "$repo" --exclude=.git --exclude=node_modules --exclude=bin --exclude=obj \
+    --exclude=.scala-build --exclude=.bsp --exclude=.superpowers -cf - . | tar -C "$tmp" -xf -
+rm -rf "$tmp/$track/src"
+cp -r "$tmp/$track/solutions" "$tmp/$track/src"
+cd "$tmp/$track"
+./test.sh