✨(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- Helm sources are outdated.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.

src/tsclient/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "impress-openapi-client-ts",
+  "version": "0.1.0",
+  "private": true,
+  "description": "Tool to generate Typescript API client for the impress application.",
+  "scripts": {
+    "generate:api:client:local": "./scripts/openapi-typescript-codegen/generate_api_client_local.sh $1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/numerique-gouv/impress.git"
+  },
+  "author": {
+    "name": "DINUM",
+    "email": "dev@mail.numerique.gouv.fr"
+  },
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/numerique-gouv/impress/issues"
+  },
+  "homepage": "https://github.com/numerique-gouv/impress#readme",
+  "devDependencies": {
+    "openapi-typescript-codegen": "0.29.0"
+  }
+}