feat: enhance dev init with file detection, VSCode support, and new web template

[Copilot]

This PR implements three major optimizations to the dev init command:

🛡️ Enhanced Safety for Current Directory Initialization

When using dev init ./ to initialize in the current directory, the command now:

• Detects existing files (excluding .git directories)
• Prompts users for confirmation before potentially overwriting files
• Displays a preview of existing files to help users make informed decisions

$ dev init ./
>> Directory /current/path contains existing files: package.json, src, README.md... <<

This may overwrite existing files. Continue? (y/N)

🎨 VSCode IDE Integration for All Templates

Added comprehensive VSCode support to enhance developer experience:

• Auto-formatting: Format on save with Prettier
• Auto-linting: ESLint fixes applied automatically on save
• Smart imports: Automatic import organization and suggestions
• Extension recommendations: Curated list of helpful VSCode extensions

All existing templates (ts-node, ts-bin) and the new template now include:

• .vscode/settings.json with optimized TypeScript and linting configurations
• .vscode/extensions.json with recommended extensions

🚀 New Frontend TypeScript Library Template

Introduces a new "TypeScript Web Library" template (tpl-ts-web) featuring:

• Live development server: Webpack dev server with hot reload at localhost:3000
• Interactive demo page: Beautiful HTML preview with live library testing capabilities
• Modern build system: TypeScript 5, Webpack 5, ESLint, Jest
• Multiple output formats: UMD for browsers, CommonJS for Node.js
• Complete testing setup: Jest with jsdom environment and coverage reporting

The template includes a fully functional demo page that automatically reloads when code changes, making frontend library development fast and interactive.

📦 Template System Updates

• Updated template list to include the new "TypeScript Web Library" option
• Bumped versions for existing templates with new VSCode configurations
• Maintained backward compatibility with existing workflows

All changes follow minimal modification principles while significantly enhancing the developer experience for TypeScript project initialization.

Fixes #55.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• unpkg.com
  • Triggering command: node /home/REDACTED/work/make-dev-fast/make-dev-fast/packages/dev/bin/dev.js init ./ (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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