✨(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- Helm sources are outdated.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.

docker/files/usr/local/etc/gunicorn/impress.py

@@ -0,0 +1,16 @@
+# Gunicorn-django settings
+bind = ["0.0.0.0:8000"]
+name = "impress"
+python_path = "/app"
+
+# Run
+graceful_timeout = 90
+timeout = 90
+workers = 3
+
+# Logging
+# Using '-' for the access log file makes gunicorn log accesses to stdout
+accesslog = "-"
+# Using '-' for the error log file makes gunicorn log errors to stderr
+errorlog = "-"
+loglevel = "info"