v1.0.0 official release of infctx trainer

This is a major release from the original infctx trainer with a huge list of features, from the original infctx trainer

• HF First dataset configuration (see: https://github.com/RWKV/RWKV-infctx-trainer/tree/main/notebook/dataset-config)
• Deepspeed 3 support
• Support for world tokenizer
• Script included to initialize new models, to train models from scratch
• RWKV v5 support (to finetune upcoming models)
• BPTT support (default), for training arbitary data context length

Thanks for all those who helped test the trainer for bugs and issues, even when it was in a very rough early stages. While there are still some features that need to be added, or performance and docs that needs improving. For the vast majority of use cases, you should be able to get started with this new trainer for your finetuning (non LoRA) needs.

Special thanks to @Blealtan @BlinkDL @Yuzaboto @Bananaman