Add free workflow assets and update README to link and showcase them. Embedded SDXL and Flux free workflow links and images (assets/sdxlfree.png, assets/fluxfree.png) in README.md. Bump package version in pyproject.toml from 1.8.7 to 1.8.8.
Add free workflow assets and update README to link and showcase them. Embedded SDXL and Flux free workflow links and images (assets/sdxlfree.png, assets/fluxfree.png) in README.md. Bump package version in pyproject.toml from 1.8.7 to 1.8.8.