CLI cleanup and documentation (#2244)

* CLI init refactor

* fix

* cleanup and (partial) docs

* Adding documentation and continuing cleanup (in progress)

* remove finetune.py script

* continued cleanup and documentation

* pytest fixes

* review comments

* fix

* Fix

* typing fixes

* make sure the batch dataset patcher for multipack is always loaded when handling datasets

* review comments

* fix

---------

Co-authored-by: Dan Saunders <dan@axolotl.ai>
Co-authored-by: Wing Lian <wing@axolotl.ai>

tests/e2e/patched/test_resume.py

@@ -9,8 +9,8 @@ import subprocess
 
 from transformers.utils import is_torch_bf16_gpu_available
 
-from axolotl.cli import load_datasets
-from axolotl.common.cli import TrainerCliArgs
+from axolotl.cli.args import TrainerCliArgs
+from axolotl.common.datasets import load_datasets
 from axolotl.train import train
 from axolotl.utils.config import normalize_config
 from axolotl.utils.dict import DictDefault
@@ -71,7 +71,7 @@ class TestResumeLlama:
         cli_args = TrainerCliArgs()
         dataset_meta = load_datasets(cfg=cfg, cli_args=cli_args)
 
-        train(cfg=cfg, cli_args=cli_args, dataset_meta=dataset_meta)
+        train(cfg=cfg, dataset_meta=dataset_meta)
 
         resume_cfg = cfg | DictDefault(
             {
@@ -81,7 +81,7 @@ class TestResumeLlama:
         normalize_config(resume_cfg)
         cli_args = TrainerCliArgs()
 
-        train(cfg=resume_cfg, cli_args=cli_args, dataset_meta=dataset_meta)
+        train(cfg=resume_cfg, dataset_meta=dataset_meta)
         check_model_output_exists(temp_dir, cfg)
 
         tb_log_path_1 = most_recent_subdir(temp_dir + "/runs")