✨(project) Django boilerplate

This commit introduces a boilerplate inspired by https://github.com/numerique-gouv/impress.
The code has been cleaned to remove unnecessary Impress logic and dependencies.

Changes made:
- Removed Minio, WebRTC, and create bucket from the stack.
- Removed the Next.js frontend (it will be replaced by Vite).
- Cleaned up impress-specific backend logics.

The whole stack remains functional:
- All tests pass.
- Linter checks pass.
- Agent Connexion sources are already set-up.

Why clear out the code?

To adhere to the KISS principle, we aim to maintain a minimalist codebase. Cloning Impress
allowed us to quickly inherit its code quality tools and deployment configurations for staging,
pre-production, and production environments.

What’s broken?
- The tsclient is not functional anymore.
- Some make commands need to be fixed.
- Helm sources are outdated.
- Naming across the project sources are inconsistent (impress, visio, etc.)
- CI is not configured properly.

This list might be incomplete. Let's grind it.

README.md

@@ -0,0 +1,82 @@
+# Impress
+
+Impress prints your markdown to pdf from predefined templates with user and role based access rights.
+
+Impress is built on top of [Django Rest
+Framework](https://www.django-rest-framework.org/) and [Next.js](https://nextjs.org/).
+
+## Getting started
+
+### Prerequisite
+
+Make sure you have a recent version of Docker and [Docker
+Compose](https://docs.docker.com/compose/install) installed on your laptop:
+
+```bash
+$ docker -v
+  Docker version 20.10.2, build 2291f61
+
+$ docker compose -v
+  docker compose version 1.27.4, build 40524192
+```
+
+> ⚠️ You may need to run the following commands with `sudo` but this can be
+> avoided by assigning your user to the `docker` group.
+
+### Project bootstrap
+
+The easiest way to start working on the project is to use GNU Make:
+
+```bash
+$ make bootstrap FLUSH_ARGS='--no-input'
+```
+
+Then you can access to the project in development mode by going to http://localhost:3000.
+You will be prompted to log in, the default credentials are:
+```bash
+username: impress
+password: impress
+```
+---
+
+This command builds the `app` container, installs dependencies, performs
+database migrations and compile translations. It's a good idea to use this
+command each time you are pulling code from the project repository to avoid
+dependency-related or migration-related issues.
+
+Your Docker services should now be up and running 🎉
+
+[FIXME] Explain how to run the frontend project.
+
+### Adding content
+
+You can create a basic demo site by running:
+
+    $ make demo
+
+Finally, you can check all available Make rules using:
+
+```bash
+$ make help
+```
+
+### Django admin
+
+You can access the Django admin site at
+[http://localhost:8071/admin](http://localhost:8071/admin).
+
+You first need to create a superuser account:
+
+```bash
+$ make superuser
+```
+
+## Contributing
+
+This project is intended to be community-driven, so please, do not hesitate to
+get in touch if you have any question related to our implementation or design
+decisions.
+
+## License
+
+This work is released under the MIT License (see [LICENSE](./LICENSE)).