Add code checker commands in the readme

Signed-off-by: Gaëtan Lehmann <[email protected]>

Author: glehmann

README.md

@@ -352,6 +352,22 @@ It is automatically executed after every pull request or commit pushed to this r
 #### More
 Check `./jobs.py --help` and `./jobs.py {command name} --help`.
 
+## Development
+
+This projects uses multiple code checkers to ensure a high quality and coherence of the code.
+The checkers are run in the CI on github and will report any failure in the PRs.
+
+To run the checkers locally, you need to install the dev dependencies, and run these commands:
+
+```sh
+mypy --install-types --non-interactive lib/ conftest.py pkgfixtures.py tests/
+pyright lib/ conftest.py pkgfixtures.py
+ruff check lib/ tests/
+flake8
+```
+
+The code checker diagnostics can also be shown directly in your IDE or text editor.
+
 ## VM setup
 Many tests expect VMs with:
 * OpenSSH server installed and accepting pubkey authentication for the `root` user