hunyuan2-plus-plus v0.1.0

• docs: add per-version CHANGELOG (2a68d66)
• fix: corrected Hermite comparison arm to x = +k (hicache-pp 1.2.0), DMD i5 re-validated (66d7ed4)
• docs: drop unreleased dit-plus row from the family matrix (cc3f415)
• docs: standardize family README (hub link, method naming, attribution) (4ea75c7)
• chore: remove unused square logo (banner is the only displayed image) (b3564ed)
• docs: badge row — real upstream + arXiv links, drop vanity (db75533)
• docs: add logo + landscape banner to README header (8429335)
• docs(readme): add 'when to use' positioning matrix (74a72a2)
• docs: add Citation section (base model + acceleration methods) (96758d4)
• Initial release: hunyuan2++ — HiCache++ (DMD) on Hunyuan3D-2 mini (7921162)