Add workshop scaffold script for new contributors and interns

[beagandica]

Summary

Workshop scaffold script for creating new workshop directories with all required template files. Designed for summer interns and new contributors.

Usage

python tools/new-workshop.py --name "python-web-scraping" --title "Python: Web Scraping"
python tools/new-workshop.py --name "my-workshop" --title "My Workshop" --activities 5 --difficulty Intermediate
python tools/new-workshop.py --name "my-workshop" --title "My Workshop" --dry-run
python tools/new-workshop.py --name "my-workshop" --title "My Workshop" -l espanol

What it generates

content/{language}/{workshop-name}/
  _index.md          Main workshop page (title, description, TOC)
  activity-1.md      Activity templates (numbered, weighted)
  activity-2.md
  activity-3.md
  answer-key.md      Solutions template (hidden: true)
  media/.gitkeep     Asset folder (tracked by git)

Features

• Validation: kebab-case names, activity limits (1-25), language directory check
• Safety: --dry-run previews without writing, checks for existing directories
• YAML escaping: Handles quotes in titles safely
• Cross-platform: Works on Windows, Mac, Linux
• CWD detection: Auto-resolves repo root if run from tools/ directory
• Hugo-compatible: Valid frontmatter, shortcodes, and file structure
• No dependencies: Python 3 stdlib only (from __future__ import annotations for 3.7+ compat)

QA

• 10-model review (Opus, Sonnet, GPT-5.4, GPT-5.2, Haiku)
• Bugs found and fixed: YAML injection, Python 3.10+ compat, CWD detection, download field removed, dynamic answer-key weight, .gitkeep for empty dirs, activity cap, input validation