docs: scope model versions and parameter list to Cosmos3-Edge

Add Cosmos 3 training content summary link

Add August 2026 checkpoint update notice to model card (#63)

Update Cosmos3-Edge benchmark tables (#59)

Update checkpoint (#58)

Update I2V, FD, and ID examples for the converted checkpoint (#61)

Update Cosmos3-Edge I2V default recipe to 20 steps (#56)

Add Diffusers user guide for Cosmos3 Edge (#52)

Cleanup: remove 6 orphaned example_*_output.* assets superseded by edge_*_output.* (#51)

Engines: add vLLM-Omni and vLLM (listed first) alongside PyTorch

Usage: switch reasnor examples to vLLM (#48)

Usage: switch Generation examples to vLLM-Omni (Nano/Super convention) (#46)

Initial release