docs: polish README + write AGENTS.md + SKILLS.md, refresh CLAUDE.md

perf(preload): broaden globs to capture configs + index.jsons (~47 GB total)

fix(deploy): switch model lookups to HF + fix ZeroGPU build

fix(realesrgan): switch repo from xinntao/Real-ESRGAN to lllyasviel/Annotators

docs: hf space frontmatter + readme

chore: project scaffolding (pyproject, requirements, license, claude.md, tests)