#915 - Created app dirs and set as constants in the top-level init.

- renamed _config_values_main to training_config.py and renamed the ConfigValuesMain class to TrainingConfig.
Moved training_config.py to src/primaite/config/training_config.py
- Renamed all training config yaml file keys to make creating an instance of TrainingConfig easier.
Moved action_type and num_steps over to the training config.
- Decoupled the training config and lay down config.
- Refactored main.py so that it can be ran from CLI and can take a training config path and a lay down config path.
- refactored all outputs so that they save to the session dir.
- Added some necessary setup scripts that handle creating app dirs, fronting example config files to the user, fronting demo notebooks to the user, performing clean-up in between installations etc.
- Added functions that attempt to retrieve the file path of users example config files that have been fronted by the primaite setup.
- Added logging config and a getLogger function in the top-level init.
- Refactored all logs entries logged to use a logger using the primaite logging config.
- Added basic typer CLI for doing things like setup, viewing logs, viewing primaite version, running a basic session.
- Updated test to use new features and config structures.
- Began updating docs. More to do here.

src/primaite/notebooks/__init__.py

@@ -0,0 +1,36 @@
+# Crown Copyright (C) Dstl 2022. DEFCON 703. Shared in confidence.
+import importlib.util
+import os
+import subprocess
+import sys
+
+from primaite import NOTEBOOKS_DIR, getLogger
+
+_LOGGER = getLogger(__name__)
+
+
+def start_jupyter_session():
+    """
+    Starts a new Jupyter notebook session in the app notebooks directory.
+
+    Currently only works on Windows OS.
+
+    .. todo:: Figure out how to get this working for Linux and MacOS too.
+    """
+    if sys.platform == "win32":
+        if importlib.util.find_spec("jupyter") is not None:
+            # Jupyter is installed
+            working_dir = os.getcwd()
+            os.chdir(NOTEBOOKS_DIR)
+            subprocess.Popen("jupyter lab")
+            os.chdir(working_dir)
+        else:
+            # Jupyter is not installed
+            _LOGGER.error("Cannot start jupyter lab as it is not installed")
+    else:
+        msg = (
+            "Feature currently only supported on Windows OS. For "
+            "Linux/MacOS users, run 'cd ~/primaite/notebooks; jupyter "
+            "lab' from your Python environment."
+        )
+        _LOGGER.warning(msg)