feat: add code-tour skill — AI-generated CodeTour walkthroughs

[vaddisrinivas]

Summary

Adds the code-tour skill — an AI-powered CodeTour generator that creates persona-targeted, step-by-step .tour files linking to real files and line numbers in any repository.

What it does

• Creates CodeTour-compatible .tour JSON files for VS Code
• Supports 20 developer personas (new joiner, bug fixer, architect, PR reviewer, vibecoder, security reviewer, performance optimizer, and more)
• Covers all CodeTour step types: file/line, selection, pattern, uri, commands, directory, view
• Supports tour-level fields: ref, isPrimary, nextTour for multi-tour series
• Works with any repository in any language — includes entry-point maps for Node/TS, Python, Go, Rust, Java, Ruby, PHP, and more
• Includes depth controls (quick/standard/deep) and repo-type-specific strategies (monorepo, API, CLI, library, frontend, data pipeline)

Links

• Repo: https://github.com/vaddisrinivas/code-tour
• Install: npx skills add vaddisrinivas/code-tour

Checklist

• Skill folder created at skills/code-tour/SKILL.md
• Frontmatter includes name and description
• Branch created from staged
• PR targets staged branch

[github-actions]

🔍 Skill Validator Results

2 resource(s) checked | ✅ All checks passed

Full output

Found 1 skill(s)
[code-tour] 📊 code-tour: 5,620 BPE tokens [chars/4: 5,617] (comprehensive ✗), 28 sections, 5 code blocks
[code-tour]    ⚠  Skill is 5,620 BPE tokens (chars/4 estimate: 5,617) — "comprehensive" skills hurt performance by 2.9pp on average. Consider splitting into 2–3 focused skills.
�[32m✅ All checks passed (1 skill(s))�[0m

[vaddisrinivas]

Closing — will resubmit as separate PRs per skill, following contribution guidelines.