chore(PR templates): fix PR templates - old ones were too busy

[Ryan-Millard]

Below is the exact change I made - 1 PR template for everything to simplify it all.

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What was changed & why

Fixes:

Changes

Testing & Verification

Additional Resources

Summary by CodeRabbit

• Chores
  • Simplified and consolidated pull request templates into a unified structure for improved consistency in the contribution process.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

📝 Walkthrough

Walkthrough

The PR consolidates multiple specialized GitHub pull request templates into a single standardized template. Four template variant files (bugfix, chore, docs, feature) are removed, while the main template is restructured with new sections for documenting what was changed and why, fixes, changes, testing verification, and additional resources.

Changes

Cohort / File(s)	Summary
Main PR Template Redesign .github/PULL_REQUEST_TEMPLATE.md	Replaced template structure; removed original header and template links; added preface comment, "What was changed & why" section, and reorganized blocks for Fixes, Changes, Testing & Verification, and Additional Resources. (+20/-48)
Deprecated Variant Templates .github/PULL_REQUEST_TEMPLATE/bugfix.md, .github/PULL_REQUEST_TEMPLATE/chore.md, .github/PULL_REQUEST_TEMPLATE/docs.md, .github/PULL_REQUEST_TEMPLATE/feature.md	Deleted all four specialized PR template variant files; removed structured sections and guidance for bug fixes, maintenance, documentation, and feature PRs respectively.

Poem

🐰 One template to rule them all, no more—
Bugfix, chore, docs, feature, four doors now one.
A unified form, streamlined and bright,
Where all contributions find their way right. ✨

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

🚥 Pre-merge checks | ✅ 3

✅ 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 accurately describes the main change: consolidating multiple busy PR templates into a single simplified template.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

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[Ryan-Millard]

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## What was changed & why
<!-- A sentence or two describing the change. -->
<!-- A brief motivation for this change -->




<!-- Use the fixes keyword below and the issue related to this PR to link them. -->
Fixes: 

## Changes
<!-- A list of important changes -->




## Testing & Verification
<!-- If there are tests, explain how you wrote them. Otherwise, explain how you know this works.  -->
<!-- This doesn't apply to docs -->




## Additional Resources
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@Krasner, is this better?

[Krasner]

Yes much better. The old one has a too much text and seemed like a bunch of LLM generated sections.