Enhance dependency analysis with TypeScript type system

[poteboy]

This PR improves the dependency analysis functionality by leveraging TypeScript's type system:

• Utilize TypeScript's type checker for accurate module resolution
• Add support for dynamic imports
• Remove custom module resolution in favor of TypeScript's built-in functionality
• Improve performance by early filtering of node_modules
• Clean up and simplify the codebase

The changes make the analyzer more reliable and maintainable while improving its accuracy in detecting dependencies.

Example of improved analysis:

// src/components/Button.tsx
export const Button = () => {
return <button>Click me</button>
}
// src/components/Header.tsx
import { Avatar } from './Avatar'
export const Header = () => {
return <div><Avatar /></div>
}
// src/components/Avatar.tsx
export const Avatar = () => {
return <div>Avatar</div>
}

The analyzer can now correctly identify:

• Button.tsx as "safe to remove" (no dependencies, not used)
• Header.tsx and Avatar.tsx as "needs review" (interdependent)

This helps LLM safely identify unused components while being cautious with interconnected files.

[railway-app]

🚅 Previously deployed to Railway in the onestack.dev project. Environment has been deleted.