fix(misc): safely iterate over package.json scripts in nx init command

[leosvelperez]

Current Behavior

Running nx init command on a repo where the package.json file doesn't have a scripts entry throws an error.

Expected Behavior

The nx init command should safely handle a repo with a package.json without a scripts entry.

Related Issue(s)

Fixes #16505

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Name	Status	Preview	Comments	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Apr 24, 2023 3:45pm

[nx-cloud]

☁️ Nx Cloud Report

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✅ Successfully ran 8 targets

• nx affected -t e2e-macos --parallel=1 --exclude=e2e-detox
• nx affected --target=e2e --base=786323d5cdac90f5c887ced6b2c31854431a1326 --head=90741043e55fbe10dee9a9974bc2a624b439e7fd --parallel=1
• nx affected --target=test --base=786323d5cdac90f5c887ced6b2c31854431a1326 --head=90741043e55fbe10dee9a9974bc2a624b439e7fd --parallel=1
• nx affected --target=build --base=786323d5cdac90f5c887ced6b2c31854431a1326 --head=90741043e55fbe10dee9a9974bc2a624b439e7fd --parallel=3
• nx run-many -t check-imports check-commit check-lock-files depcheck --parallel=1 --no-dte
• nx affected --target=lint --base=786323d5cdac90f5c887ced6b2c31854431a1326 --head=90741043e55fbe10dee9a9974bc2a624b439e7fd --parallel=3
• nx-cloud record -- nx format:check --base=786323d5cdac90f5c887ced6b2c31854431a1326 --head=90741043e55fbe10dee9a9974bc2a624b439e7fd
• nx documentation --no-dte

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