Docs described the pre-#67 suite: a removed standalone LCM converter
node, a removed model_version input, a nonexistent
CoreMLDetailerHookProvider node, and a deleted lcm/converter.py file.
- drop LCM converter node docs; LCM checkpoints are auto-detected by
the consolidated CoreMLConverter
- remove model_version input and invented 512-768 resolution range
- replace phantom detailer-hook fix with real workarounds
- fix Python support claim (3.12+ per requires-python)
- update LCM support-matrix row, drop stale line reference
Refs #67, #68