📝(client) add minimalist README

For now, we want the full workflow to be operational.

README.md

@@ -55,6 +55,10 @@ Et enfin, pour lancer les tests du projet :
 make test
 ```
 
+## Utilisation du client d'API et du CLI `qcc`
+
+Voir la documentation du projet : [./src/client/](./src/client/)
+
 ## Licence
 
 QualiCharge est distribué selon les termes de la licence MIT (voir le fichier

src/client/LICENSE

@@ -0,0 +1,10 @@
+MIT License
+
+Copyright (c) 2024-present Ministères de la Transition écologique & de la Cohésion des territoires
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+

src/client/README.md

@@ -1 +1,19 @@
 # QualiCharge API client (and CLI!)
+
+## Getting started with the CLI
+
+`qcc` can be installed using `pip`:
+
+```
+pip install qcc
+```
+
+Get the list of commands and usage using the `--help` option:
+
+```
+qcc --help
+```
+
+## License
+
+This work is released under the MIT License (see LICENSE).