Mark all adapters as planned

Remove all size mentions from README

Show both standard HF and MLX model variants

Remove size mentions from tree diagram

Remove model size mentions from README

Be honest: adapter is Qwen3-4B only, other sizes/families need retraining

Clarify: one adapter, compatible across Qwen3 sizes

Fix README: only list available adapter, mark others as planned

Replace incorrect README with accurate description

Initial model card