docs: add maintenance guide; fix AppImage version selection; bump to 1.1.0
- Add MAINTENANCE.md (dependency updates, EOL watch, build/smoke-test
workflows, orientation-fix invariants)
- Remove AGENTS.md; fold its unique context into MAINTENANCE.md
- Add .venv/.posit/appimage to .dockerignore to shrink build context
- Fix build-appimage.sh to select the wheel matching pyproject.toml
version instead of alphabetically-first (bundled stale 1.0.0 code)
- Bump version 1.0.0 -> 1.1.0 in pyproject.toml, uv.lock, AppImage recipe
dan
c8194742d1