[dev-infctx][batch 4] Torch.compile + deepspeed_3 support + typo/notebook/readme changes

[PicoCreator]

• tweaks in the model to support

  • both Torch.compile (disabled unless we are on torch 2.1.0 by default)
    • Torch.compile is currently only on nightly branch for some repos, which is unstable !!!
  • deepspeed_3 (it technically still has a warning for trace issues, but according to the validation run, it works)

• bump versions in readme for

  • lightning==2.0.4 deepspeed==0.9.5
  • pytorch==2.0.1 pytorch-cuda=11.8

• change default ctx_len_cutoff to blank array (disable)

• fixed a typo of multi_column_separator_encodings (was multi_column_seperator_encodings) for data processing

• reorganised notebooks for better reproducibility

PS: let me know if you want this to be split up, the bulk of the core changes however is only in model.py (require batch 3 merge), with the rest being typo/readme/notebook changes