Add terminal walkthrough assets

scripts/render_tape.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [ "$#" -lt 1 ] || [ "$#" -gt 2 ]; then
+    printf 'Usage: %s <tape-file> [output-file]\n' "$0" >&2
+    exit 1
+fi
+
+if ! command -v vhs >/dev/null 2>&1; then
+    printf '%s\n' 'vhs is required to render terminal recordings.' >&2
+    exit 1
+fi
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+TAPE_FILE="$1"
+OUTPUT_FILE="${2:-}"
+
+cd "$ROOT_DIR"
+vhs validate "$TAPE_FILE"
+
+if [ -n "$OUTPUT_FILE" ]; then
+    vhs -o "$OUTPUT_FILE" "$TAPE_FILE"
+else
+    vhs "$TAPE_FILE"
+fi