✨(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- Helm sources are outdated.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.

renovate.json

@@ -0,0 +1,26 @@
+{
+  "extends": ["github>numerique-gouv/renovate-configuration"],
+  "dependencyDashboard": true,
+  "labels": ["dependencies", "noChangeLog"],
+  "packageRules": [
+    {
+      "enabled": false,
+      "groupName": "ignored python dependencies",
+      "matchManagers": ["pep621"],
+      "matchPackageNames": []
+    },
+    {
+      "enabled": false,
+      "groupName": "ignored js dependencies",
+      "matchManagers": ["npm"],
+      "matchPackageNames": [
+        "node",
+        "node-fetch",
+        "i18next-parser",
+        "eslint",
+        "react",
+        "react-dom"
+      ]
+    }
+  ]
+}