Fix Include Item Damage error in v14 damage system

- Change behavior from 'Include Item Damage' to 'Use Item Damage'
- Replace action damage with weapon base damage instead of unshift
- Fixes error where unshift fails due to v14 single damage instance limit
- Update label to reflect new behavior

Fixes Foundryborne/daggerheart#1794

Signed-off-by: codebytaki <codebytaki@users.noreply.github.com>

.github/PULL_REQUEST_TEMPLATE.md

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+## Description
+
+<!-- Provide a brief description of what this PR does -->
+
+## Type of Change
+
+<!-- Check all that apply -->
+
+- [ ] 🐛 Bug fix (non-breaking change which fixes an issue)
+- [ ] ✨ New feature (non-breaking change which adds functionality)
+- [ ] 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] 📝 Documentation update
+- [ ] 🎨 UI/UX improvement
+- [ ] 🔧 Code refactoring
+- [ ] ⚡ Performance improvement
+
+## Testing
+
+<!-- Describe the tests you ran and how to reproduce them -->
+
+- [ ] I have tested this locally in Foundry VTT
+- [ ] All existing tests pass
+- [ ] I have added tests that prove my fix is effective or that my feature works
+
+## Screenshots (if applicable)
+
+<!-- Add screenshots or GIFs to demonstrate UI/UX changes -->
+
+## Checklist
+
+- [ ] My code follows the project's style guidelines
+- [ ] I have performed a self-review of my code
+- [ ] I have commented my code, particularly in hard-to-understand areas
+- [ ] I have made corresponding changes to the documentation
+- [ ] My changes generate no new warnings
+- [ ] Any dependent changes have been merged and published
+
+## Related Issues
+
+<!-- Link any related issues using #issue-number -->
+
+Fixes #
+
+## Additional Notes
+
+<!-- Add any other context about the PR here -->