Refactor flow for easier access to some files (avoid things like jrnl.Journal.Journal and jrnl.jrnl co-existing) (#1662)

* run format

* rename cli.py to main.py

* rename jrnl.py to controller.py

* move journal class files into journals dir

* rename start -> run in controller.py

pyproject.toml

@@ -63,7 +63,7 @@ tox = "*"
 xmltodict = "*"
 
 [tool.poetry.scripts]
-jrnl = 'jrnl.cli:cli'
+jrnl = 'jrnl.main:run'
 
 [tool.poe.tasks]
 docs-check.default_item_type = "script"
@@ -157,6 +157,8 @@ pycodestyle = [
 "flake8-*" = ["+*"]
 flake8-black = ["-BLK901"]
 
+[tool.flakeheaven.exceptions."jrnl/journals/__init__.py"]
+pyflakes = ["-F401"]
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]