Kithara v0.0.5 Release

Features:

• Support MaxText model
• Support KerasHub Gemma2 model
• Implement SFT in Kithara
• Support data loading with Ray data
• Support single host SFT workload on TPU and GPU
• Support GCE VM & QR multihost workload on TPU and GPU via Ray
• HF <-> MaxText converter for Gemma2 models
• Support Orbax checkpointing
• Support Xprof and Tensorboard
• Support saving checkpoints to cloud storage
• Support FSDP for Gemma2