update tools & badges

.pre-commit-config.yaml

+repos:
+-   repo: https://github.com/pre-commit/mirrors-clang-format
+    rev: v13.0.1
+    hooks:
+    -   id: clang-format
+        args: [-i, --style=Google]
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.1.0
+    hooks:
+    -   id: check-added-large-files
+    -   id: check-ast
+    -   id: check-executables-have-shebangs
+    -   id: check-json
+    -   id: check-merge-conflict
+    -   id: check-symlinks
+    -   id: check-toml
+    -   id: check-yaml
+    -   id: debug-statements
+    -   id: destroyed-symlinks
+    -   id: detect-private-key
+    -   id: end-of-file-fixer
+    -   id: fix-byte-order-marker
+    -   id: mixed-line-ending
+    -   id: trailing-whitespace
+-   repo: https://github.com/psf/black
+    rev: 22.3.0
+    hooks:
+    -   id: black
+-   repo: https://github.com/PyCQA/flake8
+    rev: 4.0.1
+    hooks:
+    -   id: flake8

README.md

 # CentroidalDynamicsLib
 
-[![Pipeline status](https://gepgitlab.laas.fr/humanoid-path-planner/hpp-centroidal-dynamics/badges/master/pipeline.svg)](https://gepgitlab.laas.fr/humanoid-path-planner/hpp-centroidal-dynamics/commits/master)
-[![Coverage report](https://gepgitlab.laas.fr/humanoid-path-planner/hpp-centroidal-dynamics/badges/master/coverage.svg?job=doc-coverage)](http://projects.laas.fr/gepetto/doc/humanoid-path-planner/hpp-centroidal-dynamics/master/coverage/)
+[![Pipeline status](https://gitlab.laas.fr/humanoid-path-planner/hpp-centroidal-dynamics/badges/master/pipeline.svg)](https://gitlab.laas.fr/humanoid-path-planner/hpp-centroidal-dynamics/commits/master)
+[![Coverage report](https://gitlab.laas.fr/humanoid-path-planner/hpp-centroidal-dynamics/badges/master/coverage.svg?job=doc-coverage)](http://projects.laas.fr/gepetto/doc/humanoid-path-planner/hpp-centroidal-dynamics/master/coverage/)
+[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
+[![pre-commit.ci status](https://results.pre-commit.ci/badge/github/humanoid-path-planner/hpp-centroidal-dynamics/master.svg)](https://results.pre-commit.ci/latest/github/humanoid-path-planner/hpp-centroidal-dynamics)
 
 Utility classes to check the (robust) equilibrium of a system in contact with the environment. Comes with python bindings.
 The main class that collects all the equilibrium-related algorithms is ```Equilibrium```.

pyproject.toml

+[tool.black]
+exclude = "cmake"

setup.cfg

+[flake8]
+exclude = cmake
+max-line-length = 88
+ignore = E226, E704, E24, E121, W504, E126, E123, W503, E203