README.md: Remove obsolete requirement for openssl binary

[markstos]

Also, remove the entire install section. People who are installing a technical encryption node module rarely need that.

Summary by CodeRabbit

• Documentation
  • Revised README structure by changing the “Upgrading” section to a lower-level heading for consistency.
  • Removed the “Install” section, including npm installation steps and the OpenSSL prerequisite note.
  • No changes to product behavior or APIs; this update only affects documentation.
  • Users seeking setup guidance should consult alternative documentation sources or existing package registry pages.

[coderabbitai]

Walkthrough

The README was restructured: the "Upgrading" heading level was reduced (from H1 to H2), and the entire "Install" section—covering npm install steps and an OpenSSL prerequisite—was removed. No code or API changes were made.

Changes

Cohort / File(s)	Summary
Docs: README README.md	Adjusted "Upgrading" from # to ##. Removed the "Install" section, including npm installation instructions and the OpenSSL prerequisite note. No functional/API changes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

I twitch my whiskers, docs made light,
One heading down, install’s in flight—gone from sight.
I nibble notes, concise and neat,
README trails are short and sweet.
Hop-hop! The code stays still tonight. 🐇✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title precisely summarizes the main change by indicating the removal of the outdated openssl binary requirement from the README, which directly reflects the deletion of the install section in this PR. It is concise and specific, avoiding irrelevant details or vague language. This clarity ensures that teammates scanning the commit history understand the purpose of this update.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch markstos-remove-install-from-README

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 9b91edf and 525ac6d.

📒 Files selected for processing (1)

• README.md (1 hunks)

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