docs: Update and split Contribution docs.

.github/PULL_REQUEST_TEMPLATE.md

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+## Choose a PR Template
+
+Please select the appropriate PR template for your contribution:
+
+- 🆕 [New Module](?template=new_module.md) - Adding a new module to the registry
+- 🐛 [Bug Fix](?template=bug_fix.md) - Fixing an existing issue
+- ✨ [Feature](?template=feature.md) - Adding new functionality to a module
+- 📝 [Documentation](?template=documentation.md) - Improving docs only
+
+---
+
+If you've already started your PR, add `?template=TEMPLATE_NAME.md` to your URL.
+
+### Quick Checklist
+
+- [ ] Tests pass (`bun test`)
+- [ ] Code formatted (`bun run fmt`)
+- [ ] Following contribution guidelines

.github/PULL_REQUEST_TEMPLATE/bug_fix.md

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+## Bug Fix: [Brief Description]
+
+**Module:** `registry/[namespace]/modules/[module-name]`
+**Version:** `v1.2.3` → `v1.2.4`
+
+### Problem
+
+<!-- What was broken? -->
+
+### Solution
+
+<!-- How did you fix it? -->
+
+### Testing
+
+- [ ] Tests pass (`bun test`)
+- [ ] Code formatted (`bun run fmt`)
+- [ ] Fix verified locally
+
+### Related Issue
+
+<!-- Link to issue if applicable -->

.github/PULL_REQUEST_TEMPLATE/documentation.md

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+## Documentation Update
+
+### Description
+
+<!-- What documentation did you improve? -->
+
+### Changes
+
+<!-- What specific changes were made? -->
+
+-
+-
+
+### Checklist
+
+- [ ] README validation passes (if applicable)
+- [ ] Code examples tested
+- [ ] Links verified
+- [ ] Formatting consistent
+
+### Context
+
+<!-- Why were these changes needed? -->

.github/PULL_REQUEST_TEMPLATE/feature.md

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+## Feature: [Brief Description]
+
+**Module:** `registry/[namespace]/modules/[module-name]`
+**Version:** `v1.2.3` → `v1.3.0` (or `v2.0.0` for breaking changes)
+
+### Description
+
+<!-- What does this feature add? -->
+
+### Changes
+
+<!-- List key changes -->
+
+-
+-
+
+### Breaking Changes
+
+<!-- List any breaking changes (if major version bump) -->
+
+- None / _Remove if not applicable_
+
+### Testing
+
+- [ ] Tests pass (`bun test`)
+- [ ] Code formatted (`bun run fmt`)
+- [ ] New tests added for feature
+- [ ] Backward compatibility maintained
+
+### Documentation
+
+<!-- Did you update the README? -->

.github/PULL_REQUEST_TEMPLATE/new_module.md

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+## New Module: [Module Name]
+
+**Module Path:** `registry/[namespace]/modules/[module-name]`
+**Initial Version:** `v1.0.0`
+
+### Description
+
+<!-- Brief description of what this module does -->
+
+### Checklist
+
+- [ ] All required files included (`main.tf`, `main.test.ts`, `README.md`)
+- [ ] Tests pass (`bun test`)
+- [ ] Code formatted (`bun run fmt`)
+- [ ] README has proper frontmatter
+- [ ] Icon path is valid
+- [ ] Namespace has avatar (if first-time contributor)
+
+### Testing
+
+<!-- How did you test this module? -->
+
+### Additional Notes
+
+<!-- Any special setup or dependencies? -->