Add "Before You Contribute" section with IEP guidance

[afritzler]

Proposed Changes

Add "Before You Contribute" section with IEP guidance.

Summary by CodeRabbit

• Documentation
  • Enhanced contributing guide with a new "Before You Contribute" section providing clearer guidance on initiating contributions, including GitHub issue requirements and submission processes for larger changes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 2961e407-2589-4d94-bc49-9713f26c787c

📥 Commits

Reviewing files that changed from the base of the PR and between 22a17f7 and 5350dec.

📒 Files selected for processing (1)

• docs/community/contributing.md

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📝 Walkthrough

Walkthrough

This PR adds a "Before You Contribute" section to the contributing guide that establishes an issue-first workflow requirement. Contributors are directed to tie work to existing GitHub issues, open new issues when needed, and use the enhancements repository with IEPs for larger proposals, with an initial issue opening required even for IEPs.

Changes

Contributor Guidance Documentation

Layer / File(s)	Summary
Contributor guidance for issue-first workflow and IEPs docs/community/contributing.md	New "Before You Contribute" section clarifies that contributors should tie work to existing issues, open new issues when needed, and use the enhancements repository with IEPs for larger or cross-cutting changes, requiring an initial issue even for an IEP.

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: adding a 'Before You Contribute' section with IEP guidance to the documentation.
Description check	✅ Passed	The description is minimal but adequately communicates the change. It matches the template structure with 'Proposed Changes' section, though the 'Fixes #' line is omitted.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch enh/contrib-guide

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[gonzolino]

Suggested change

	enhancements repository first to outline the idea and gather early feedback. This makes it much easier for
	enhancements repository first to outline the idea and gather early feedback. This makes it much easier for