[vercel_otel] new vercel content pack

[jakubgalecki0]

Proposed commit message

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices

Author's Checklist

• [ ]

How to test this PR locally

Related issues

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[github-actions]

Elastic Docs Style Checker (Vale)

Summary: 1 warning found

⚠️ Warnings (1): Fix when the suggestion improves clarity or correctness.

File	Line	Rule	Message
packages/vercel_otel/docs/README.md	73	Elastic.DontUse	Don't use 'and/or'.

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[infra-vault-gh-plugin-prod]

💔 Build Failed

• Buildkite Build
• Commit: f5f040d

Failed CI Steps

• 📜 Check changelog PR links

History

• 💔 Build #46904 failed eb50c64
• 💔 Build #46894 failed c4ca4c4
• 💔 Build #46893 failed d0c1b13
• 💔 Build #46844 failed 1a5b311
• 💔 Build #46784 failed a555652

[elastic-vault-github-plugin-prod]

✅ All changelog entries have the correct PR link.