CLI #94 — Handle non-JSON API error responses gracefully

[Tinna23]

Task

If the API returns a non-JSON body, print a clear error message instead of crashing on JSON parse.

Files to update

packages/cli/src/lib/client.ts
packages/cli/src/lib/errors.ts

[Hassan-oladipupo]

Hi maintainer, can i take this

[grantfox-oss]

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Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #489)
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