Implement editor-related steps in pytest-bdd

- Implement mock editor fixture
- Add fixture to keep track of editor state
- Implement various steps to check editor state

Co-authored-by: Micah Jerome Ellison <micah.jerome.ellison@gmail.com>

pyproject.toml

@@ -51,8 +51,9 @@ toml = ">=0.10"
 pyflakes = ">=2.2.0"
 pytest = ">=6.2"
 pytest-bdd = "^4.0.1"
-pytest-icdiff = "^0.5"
 yq = ">=2.11"
+ipdb = ">=0.13"
+pytest-clarity = "^0.3.0-alpha.0"
 
 [tool.poetry.scripts]
 jrnl = 'jrnl.cli:cli'
@@ -66,9 +67,15 @@ force_sort_within_sections = true
 
 [tool.pytest.ini_options]
 minversion = "6.0"
+required_plugins = [
+  "pytest-bdd"
+]
 markers = [
     "todo",
 ]
+addopts = [
+  "--pdbcls=IPython.terminal.debugger:Pdb"
+]
 
 filterwarnings = [
     "ignore::DeprecationWarning",