[pre-commit] Add initial pre-commit config

This change adds configuration for the pre-commit tool,
follow-up changes will address the remaining issues in a phased
approach to make the reviews simpler.

This is based on the pre-commit config used in nova
with some additional hooks.

Follow-up changes will address the FIXME comments
related to sphinx-lint and codespell, as well as update tox
to enforce these checks in ci.

Change-Id: I87681a19f7fa88366c2b0d310c8b3153aa6a137b

watcher/decision_engine/model/collector/cinder.py

@@ -165,6 +165,7 @@ class CinderModelBuilder(base.BaseModelBuilder):
     - Storage-related knowledge (Cinder)
 
     """
+
     def __init__(self, osc):
         self.osc = osc
         self.model = model_root.StorageModelRoot()

watcher/decision_engine/model/collector/ironic.py

@@ -78,6 +78,7 @@ class BareMetalModelBuilder(base.BaseModelBuilder):
 
     - Baremetal-related knowledge (Ironic)
     """
+
     def __init__(self, osc):
         self.osc = osc
         self.model = model_root.BaremetalModelRoot()