[README.md] Add badges license.

Fix presentation.

Author: olivier-stasse

README.md

@@ -1,9 +1,11 @@
 dynamic-graph bindings
 ======================
 
-[![Building Status](https://travis-ci.org/stack-of-tasks/dynamic_graph_bridge.svg?branch=master)](https://travis-ci.org/stack-of-tasks/dynamic_graph_bridge)
+[![Licence](https://img.shields.io/badge/License-BSD%202--Clause-green.svg)](https://opensource.org/licenses/BSD-2-Clause)
 [![Pipeline status](https://gitlab.laas.fr/stack-of-tasks/dynamic_graph_bridge/badges/master/pipeline.svg)](https://gitlab.laas.fr/stack-of-tasks/dynamic_graph_bridge/commits/master)
 [![Coverage report](https://gitlab.laas.fr/stack-of-tasks/dynamic_graph_bridge/badges/master/coverage.svg?job=doc-coverage)](http://projects.laas.fr/gepetto/doc/stack-of-tasks/dynamic_graph_bridge/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/stack-of-tasks/dynamic_graph_bridge/master.svg)](https://results.pre-commit.ci/latest/github/stack-of-tasks/dynamic_graph_bridge)
 [![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/charliermarsh/ruff/main/assets/badge/v1.json)](https://github.com/charliermarsh/ruff)
 
 This ROS package binds together the ROS framework with the