use separate ignore files for prettier and eslint

[brian14708]

Use separate ignore files for prettier and eslint.

Fixes #4937

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🦋 Changeset detected

Latest commit: 65bb6d5

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create-svelte	Patch

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[Rich-Harris]

thank you!

[benmccann]

Ignoring the lock files makes sense, but do we want to ignore package.json as well? Maybe that one could be checked / formatted

[brian14708]

Ignoring the lock files makes sense, but do we want to ignore package.json as well? Maybe that one could be checked / formatted

ignored package.json because it wasn't formatted correctly be default.

attempt fix in #5013