fix: rename run() to main() to satisfy pure openenv validator constraints

fix: resolve openenv validation errors (app.py, project.scripts, openenv-core)

fix: add pyproject.toml required for openenv multi-mode validation

fix: remove emojis from README, strict compliance formats in inference.py

fix: add root redirect to /docs, fix Not Found on App tab

feat: initial OpenEnv data-cleaning-env submission v1.0.0