✨(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- Helm sources are outdated.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.

docs/tsclient.md

@@ -0,0 +1,25 @@
+# Api client TypeScript
+
+The backend application can automatically create a TypeScript client to be used in frontend
+applications. It is used in the impress front application itself.
+
+This client is made with [openapi-typescript-codegen](https://github.com/ferdikoomen/openapi-typescript-codegen)
+and impress's backend OpenAPI schema (available [here](http://localhost:8071/v1.0/swagger/) if you have the backend running).
+
+## Requirements
+
+We'll need the online OpenAPI schema generated by swagger. Therefore you will first need to
+install the backend application.
+
+## Install openApiClientJs
+
+```sh
+$ cd src/tsclient
+$ yarn install
+```
+
+## Generate the client
+
+```sh
+yarn generate:api:client:local <output_path_for_generated_client>
+```