fix(js): throw better error messaging when a dependency is not in the graph

[AgentEnder]

… graph

Current Behavior

When trying to build the package.json, we don't null check a property access resulting in a confusing error message

Expected Behavior

We null check and throw a more appropriate error.

Related Issue(s)

Fixes #16489

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Apr 24, 2023 5:14pm

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✅ Successfully ran 8 targets

• nx affected -t e2e-macos --parallel=1 --exclude=e2e-detox
• nx affected --target=e2e --base=929a08ab957e2330b57acc7513cce3357922019c --head=52e07490d7681168601910c1ee9036ecb11a0e45 --parallel=1
• nx affected --target=test --base=929a08ab957e2330b57acc7513cce3357922019c --head=52e07490d7681168601910c1ee9036ecb11a0e45 --parallel=1
• nx affected --target=build --base=929a08ab957e2330b57acc7513cce3357922019c --head=52e07490d7681168601910c1ee9036ecb11a0e45 --parallel=3
• nx run-many -t check-imports check-commit check-lock-files depcheck --parallel=1 --no-dte
• nx affected --target=lint --base=929a08ab957e2330b57acc7513cce3357922019c --head=52e07490d7681168601910c1ee9036ecb11a0e45 --parallel=3
• nx-cloud record -- nx format:check --base=929a08ab957e2330b57acc7513cce3357922019c --head=52e07490d7681168601910c1ee9036ecb11a0e45
• nx documentation --no-dte

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[github-actions]

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