`vp migrate` fails when there is no `package.json`

[TheAlexLichter]

Describe the bug

In an invalid project, Vite+ should tell that this isnt a valid project instead of failing

Reproduction

Steps to reproduce

1. mkdir test
2. cd test
3. vp migrate
4. error

ENOENT: no such file or directory, open '/Users/alichter/Programming/demo-day/package.json'
Error: ENOENT: no such file or directory, open '/Users/alichter/Programming/demo-day/package.json'
    at Object.readFileSync (node:fs:483:20)
    at readJson (file:///Users/alichter/.vite-plus/1.0.0-rc.0/node_modules/.pnpm/vite-plus@1.0.0-rc.0_@vitest+ui@5.0.1_vitest@5.0.1_/node_modules/vite-plus/dist/migration/bin.js:2617:22)
    at planVitestV5Migration (file:///Users/alichter/.vite-plus/1.0.0-rc.0/node_modules/.pnpm/vite-plus@1.0.0-rc.0_@vitest+ui@5.0.1_vitest@5.0.1_/node_modules/vite-plus/dist/migration/bin.js:2921:15)
    at main (file:///Users/alichter/.vite-plus/1.0.0-rc.0/node_modules/.pnpm/vite-plus@1.0.0-rc.0_@vitest+ui@5.0.1_vitest@5.0.1_/node_modules/vite-plus/dist/migration/bin.js:3916:21) {
  errno: -2,
  code: 'ENOENT',
  syscall: 'open',
  path: '/Users/alichter/Programming/demo-day/package.json'
}

System Info

-

Used Package Manager

pnpm

Logs

Validations

• Read the Contributing Guidelines.
• Check that there isn't already an issue for the same bug.
• Confirm this is a Vite+ issue and not an upstream issue (Vite, Vitest, tsdown, Rolldown, or Oxc).
• The provided reproduction is a minimal reproducible example.