feat: add support for RustFS S3 storage

[martinfojtik]

Minio is no longer maintained; RustFS is a performant alternative with full S3 compatibility.

This PR enables setting the forcePathStyle attribute on the S3Client, which RustFS requires.

To have RustFS on your local machine, you should update your environment variables. Go to the dockers folder and run docker compose -f storage-rustfs.yml up -d.

[nimser]

FWIW, RustFS already works with Teable as-is — we run it in production with BACKEND_STORAGE_PROVIDER=minio and the BACKEND_STORAGE_MINIO_* vars pointed at RustFS. The minio SDK uses path-style addressing for non-AWS endpoints, which is what RustFS wants.

develop also already carries BACKEND_STORAGE_S3_FORCE_PATH_STYLE and BACKEND_STORAGE_S3_INTERNAL_FORCE_PATH_STYLE on the s3 provider, so the forcePathStyle change here looks covered.

What still seems worth doing is naming: minio and the BACKEND_STORAGE_MINIO_* prefix name an implementation, not a protocol. Documenting s3 + FORCE_PATH_STYLE as the path for RustFS and friends, with minio as a legacy alias, would cover this without new code.