fix(cli): prevent crash when no package.json found in studio folder

[rexxars]

Description

If you have the following folder structure:

.
├── node_modules
│   └── sanity
├── package.json
└── studios
    ├── studio-1
    │   └── sanity.config.ts
    └── studio-2
        └── sanity.config.ts

Running sanity dev, sanity build or sanity deploy from within studios/studio-1 will currently crash, because we attempt to read package.json from the "work directory", which is resolved to studios/studio-1.

The folder structure does make sense, since you may want to reuse the same dependencies for multiple studios.

Additionally, if you happen to be missing required dependencies (styled-components), it will install to the studio folder, not the "dependency root" (eg in folder containing package.json). Attempted to fix this too.

Marked as draft since I have yet to write tests.

What to review

Testing

Notes for release

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
page-building-studio	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 22, 2024 7:17am
performance-studio	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 22, 2024 7:17am
test-compiled-studio	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 22, 2024 7:17am
test-next-studio	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 22, 2024 7:17am
test-studio	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 22, 2024 7:17am

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
studio-workshop	⬜️ Ignored (Inspect)			Jul 22, 2024 7:17am

[github-actions]

No changes to documentation

[github-actions]

Component Testing Report Updated Jul 22, 2024 7:32 AM (UTC)

File	Status	Duration	Passed	Skipped	Failed
comments/CommentInput.spec.tsx	✅ Passed (Inspect)	44s	15	0	0
formBuilder/ArrayInput.spec.tsx	✅ Passed (Inspect)	9s	3	0	0
formBuilder/inputs/PortableText/Annotations.spec.tsx	✅ Passed (Inspect)	30s	6	0	0
formBuilder/inputs/PortableText/copyPaste/CopyPaste.spec.tsx	✅ Passed (Inspect)	38s	11	7	0
formBuilder/inputs/PortableText/copyPaste/CopyPasteFields.spec.tsx	✅ Passed (Inspect)	0s	0	12	0
formBuilder/inputs/PortableText/Decorators.spec.tsx	✅ Passed (Inspect)	17s	6	0	0
formBuilder/inputs/PortableText/DisableFocusAndUnset.spec.tsx	✅ Passed (Inspect)	10s	3	0	0
formBuilder/inputs/PortableText/DragAndDrop.spec.tsx	✅ Passed (Inspect)	3m 0s	0	0	0
formBuilder/inputs/PortableText/FocusTracking.spec.tsx	✅ Passed (Inspect)	43s	15	0	0
formBuilder/inputs/PortableText/Input.spec.tsx	✅ Passed (Inspect)	1m 50s	21	0	0
formBuilder/inputs/PortableText/ObjectBlock.spec.tsx	✅ Passed (Inspect)	1m 14s	18	0	0
formBuilder/inputs/PortableText/PresenceCursors.spec.tsx	✅ Passed (Inspect)	8s	3	9	0
formBuilder/inputs/PortableText/RangeDecoration.spec.tsx	✅ Passed (Inspect)	25s	9	0	0
formBuilder/inputs/PortableText/Styles.spec.tsx	✅ Passed (Inspect)	18s	6	0	0
formBuilder/inputs/PortableText/Toolbar.spec.tsx	❌ Failed (Inspect)	1m 25s	20	0	1
formBuilder/tree-editing/TreeEditing.spec.tsx	✅ Passed (Inspect)	1m 48s	30	0	0
formBuilder/tree-editing/TreeEditingNestedObjects.spec.tsx	✅ Passed (Inspect)	20s	3	0	0