Remove npm auth handling in favor of docs

[bluwy]

Issues:

• closes project's .npmrc not respected #58
• closes Document of publish with NPM_TOKEN not accurately while use actions/setup-node #132
• closes [1.2.0] .npmrc detection depends on HOME process env #147
• closes Support GPR in .npmrc #178
• closes question: secrets to file system #262
• closes Publish not working for internal Artifactory registry #336
• closes Error "No user .npmrc file found" when file actually exists #342
• closes Support private registry #363
• closes Publish in custom artifactory #424

PRs:

• closes Add Optional skipNpmrc input #173
• closes feat: enable to check auth token to github packages #219
• closes Respect config in .npmrc #235
• closes Allow actions to specify target registry domain to publish #309
• closes Feat/private registry #362
• closes fix: #424 - Publish in custom artifactory #425
• closes docs: Update documentation to reflect changesets publish expected environment variable #428
• closes Support project as well as user .npmrc files. #529
• closes Fix auth setup for Yarn Berry #654
• closes node/setup-auth from tiny-actions poc #658

[changeset-bot]

🦋 Changeset detected

Latest commit: 6cc5e04

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

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@changesets/action	Major

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