docs(storybook): various fixes and additions

[mandarini]

• Fix some typos and wording on the Storybook migration guide
• Fix some typos and wording on Storybook 7 guide
• Create guide on how to customize webpack and vite on Storybook, globally and per project

[vercel]

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Name	Status	Preview	Comments	Updated
nx-dev	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Jan 16, 2023 at 1:43PM (UTC)

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✅ Successfully ran 5 targets

• nx affected --target=e2e --base=2732365a435643434079359908859ce557f1dcee --head=70f3042d2404db689b809c512ce1f32ca9158f57 --exclude=e2e-storybook,e2e-storybook-angular,e2e-react-native,e2e-detox --parallel=1
• nx affected --target=build --base=2732365a435643434079359908859ce557f1dcee --head=70f3042d2404db689b809c512ce1f32ca9158f57 --parallel=3
• nx run-many -t check-imports check-commit check-lock-files root-lint depcheck documentation --parallel=1 --no-dte
• nx affected -t test lint --base=2732365a435643434079359908859ce557f1dcee --head=70f3042d2404db689b809c512ce1f32ca9158f57 --parallel=1
• nx-cloud record -- nx format:check --base=2732365a435643434079359908859ce557f1dcee --head=70f3042d2404db689b809c512ce1f32ca9158f57

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[github-actions]

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