docs: add native reverse-distillation detector section; clarify PaDiM/PatchCore are reference baselines (sync with GitHub README)

v0.2.1: add PaDiM vs PatchCore ablation chart to headline section

v0.2.0-reconciliation: PaDiM->PatchCore card with measured OpenVINO parity

Initial public release v0.1.0-inspectnetcx-hf-release

initial commit