feat: Customer-friendly NGINX One Console home page

[mjang]

Proposed changes

We want a clear and consistent message on NGINX One, from the first intro to our customers to our docs. To that end, we're setting up a new home page for the NGINX One Console docs. Once merged, you'll see it at docs.nginx.com/nginx-one.

I've included two screenshots:

before

after

I have comments / approvals in PR #595 . I also have internal approvals from appropriate parties.

Closes #ISSUE

Checklist

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• I have read the contributing guidelines
• I have signed the F5 Contributor License Agreement (CLA)
• I have rebased my branch onto main
• I have ensured my PR is targeting the main branch and pulling from my branch from my own fork
• I have ensured that the commit messages adhere to Conventional Commits
• I have ensured that documentation content adheres to the style guide
• If the change involves potentially sensitive changes¹, I have assessed the possible impact
• If applicable, I have added tests that prove my fix is effective or that my feature works
• I have ensured that existing tests pass after adding my changes
• If applicable, I have updated README.md and CHANGELOG.md

Footnotes

1. Potentially sensitive changes include anything involving code, personally identify information (PII), live URLs or significant amounts of new or revised documentation. Please refer to our style guide for guidance about placeholder content. ↩

[github-actions]

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[mjang]

Note: approvals given in:

• feat: NGINX One Console use-case based home page #595
• DM from PM

[mjang]

Merging based on approvals in #595 and managerial approvals in internal Slack