nf-core/tools v3.0.0 preparation: update docs for new command nf-core pipelines create

[mirpedrol]

update docs for new command nf-core pipelines create

Close https://github.com/nf-core/tools/issues/2341

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[mirpedrol]

@nf-core-bot fix linting

[mirpedrol]

@nf-core-bot fix linting again please!

[mashehu]

Also fixes https://github.com/nf-core/tools/issues/3181

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❌ Deploy Preview for nf-core-docs failed. Why did it fail? →

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[mashehu]

docs deploy preview is failing because of the added Feature component. it builds locally fine, so no worries.