feat: use hf_agent tool descriptions, hardware flavors, and default env

feat: merge HF Space improvements

rewording

v3 prompt and tool desc rework

ruff

small modif

limit in rows displaying

better data shape + small change in tool desc

Fix example message selection and show as JSON with all keys

Prefer tool_calls or assistant message for example structure

Unify dataset tools into single comprehensive hf_inspect_dataset tool

modified timeout and rows parameters

Added 2 dataset tools, one to list rows, the other one to download the dataset