docs(all): remove replace global npm installation, re-write content

[JLekawa]

What/Why/How?

Replaces global installation with local installation.

Closes https://github.com/Redocly/redocly/issues/19220

Check yourself

• Code changed? - Tested with Redoc/Realm/Reunite (internal)
• All new/updated code is covered by tests
• New package installed? - Tested in different environments (browser/node)
• Documentation update considered

Security

• The security impact of the change has been considered
• Code follows company security practices and guidelines

[changeset-bot]

⚠️ No Changeset found

Latest commit: e5faf4c

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

Command	Mean [s]	Min [s]	Max [s]	Relative
redocly lint resources/rebilly.yaml	1.497 ± 0.021	1.465	1.518	1.00 ± 0.02
redocly-next lint resources/rebilly.yaml	1.495 ± 0.022	1.463	1.529	1.00

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	78.58% (🎯 78%)	6185 / 7870
🔵	Statements	78.01% (🎯 78%)	6390 / 8191
🔵	Functions	81.97% (🎯 81%)	1264 / 1542
🔵	Branches	70.39% (🎯 70%)	4239 / 6022

File Coverage

No changed files found.

Generated in workflow #8207 for commit e5faf4c by the Vitest Coverage Report Action