## Summary
- Add `version_type` choice input with options: BUMP_PATCH (default), BUMP_MINOR, BUMP_MAJOR, SPECIFIC_VERSION
- Add optional `specific_version` input for explicit version selection
- Include changelog content in Forgejo release body under "What's Changed" section
- Move CHANGELOG.md to repository root (still copied into docs during Quartz build)
- Add CHANGELOG link to docs index page
- Update doc-links script to recognize build-time docs from repo root
## Changes
**Workflow inputs:**
- Previously: single optional `version` string input
- Now: `version_type` choice dropdown (defaults to BUMP_PATCH) + optional `specific_version` for explicit versions
**Release body:**
- Previously: just asset download instructions
- Now: includes "What's Changed" section with changelog entries for this release
**CHANGELOG.md location:**
- Previously: `docs/CHANGELOG.md`
- Now: `CHANGELOG.md` (repo root), copied into docs content during build
## Deployment and Testing
- [ ] Run build workflow with BUMP_PATCH (default)
- [ ] Run build workflow with BUMP_MINOR
- [ ] Verify changelog appears in release body
- [ ] Verify docs site includes CHANGELOG page
Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/104
