Build out all 27 modules + capstone (#1)

Co-authored-by: claude <claude@jpaul.io>
Co-committed-by: claude <claude@jpaul.io>

modules/07-worktrees-running-agents-in-parallel/lab/setup-worktrees.sh

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+#!/usr/bin/env bash
+#
+# Module 7 lab — create two linked worktrees off the tasks-app repo, each on its own branch.
+# Run this from INSIDE your tasks-app repo (the one you git-init'd in Module 2):
+#
+#     bash modules/07-worktrees-running-agents-in-parallel/lab/setup-worktrees.sh
+#
+# It places the new worktree folders next to the repo, so you end up with:
+#
+#     <parent>/tasks-app          (your existing repo, on its current branch)
+#     <parent>/tasks-app-clear    (new worktree on branch feature/clear)
+#     <parent>/tasks-app-count    (new worktree on branch feature/count)
+#
+set -euo pipefail
+
+# The directory that contains the repo, so the new worktrees become siblings of it.
+ROOT="$(git rev-parse --show-toplevel)"
+PARENT="$(cd "$ROOT/.." && pwd)"
+
+git worktree add "$PARENT/tasks-app-clear" -b feature/clear
+git worktree add "$PARENT/tasks-app-count" -b feature/count
+
+echo
+echo "Worktrees created. One repo, three checked-out branches:"
+git worktree list