fix: detect package manager from lockfile in single-package repos

[nam-hle]

Summary

• Fixes a bug where single-package (non-monorepo) repos always detected packageManager: "npm" regardless of the lockfile present
• Adds detectPackageManager() in @nadle/project-resolver that checks for pnpm-lock.yaml, yarn.lock, and package-lock.json
• Adds integration tests for single-package npm, pnpm, and yarn repos (previously only monorepo scenarios were tested)

Test plan

• pnpm -F nadle test project-dir — all 7 tests pass (4 existing monorepo + 3 new single-package)
• pnpm -F @nadle/project-resolver test — all 34 tests pass
• CI passes on Ubuntu, macOS, and Windows

🤖 Generated with Claude Code

[netlify]

✅ Deploy Preview for nadle ready!

Name	Link
🔨 Latest commit	c73af2c
🔍 Latest deploy log	https://app.netlify.com/projects/nadle/deploys/699dcd05446659000737dad9
😎 Deploy Preview	https://deploy-preview-548--nadle.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 94 Accessibility: 98 Best Practices: 100 SEO: 100 PWA: - View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[github-actions]

size-limit report 📦

Path	Size
bundled	124.48 KB (0%)

[pkg-pr-new]

Open in StackBlitz

create-nadle

npx https://pkg.pr.new/nadlejs/nadle/create-nadle@548

eslint-plugin-nadle

npx https://pkg.pr.new/nadlejs/nadle/eslint-plugin-nadle@548

@nadle/kernel

npx https://pkg.pr.new/nadlejs/nadle/@nadle/kernel@548

@nadle/language-server

npx https://pkg.pr.new/nadlejs/nadle/@nadle/language-server@548

nadle

npx https://pkg.pr.new/nadlejs/nadle@548

@nadle/project-resolver

npx https://pkg.pr.new/nadlejs/nadle/@nadle/project-resolver@548

nadle-vscode-extension

npx https://pkg.pr.new/nadlejs/nadle/nadle-vscode-extension@548

commit: c73af2c