pre-commit: Add isort hook and configuration

Related to T2610

.pre-commit-config.yaml

@@ -27,6 +27,11 @@ repos:
     language: system
     types: [python]
 
+- repo: https://github.com/PyCQA/isort
+  rev: 5.5.2
+  hooks:
+  - id: isort
+
 - repo: https://github.com/python/black
   rev: 19.10b0
   hooks:

pyproject.toml

@@ -1,2 +1,11 @@
 [tool.black]
 target-version = ['py37']
+
+[tool.isort]
+multi_line_output = 3
+include_trailing_comma = true
+force_grid_wrap = 0
+use_parentheses = true
+ensure_newline_before_comments = true
+line_length = 88
+force_sort_within_sections = true