✨(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- Helm sources are outdated.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.

.github/ISSUE_TEMPLATE/Feature_request.md

@@ -0,0 +1,23 @@
+---
+name: ✨ Feature Request
+about: I have a suggestion (and may want to build it 💪)!
+
+---
+
+## Feature Request
+
+**Is your feature request related to a problem or unsupported use case? Please describe.**
+A clear and concise description of what the problem is. For example: I need to do some task and I have an issue...
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen. Add any considered drawbacks.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Discovery, Documentation, Adoption, Migration Strategy**
+If you can, explain how users will be able to use this and possibly write out a version the docs (if applicable).
+Maybe a screenshot or design?
+
+**Do you want to work on it through a Pull Request?**
+<!-- Make sure to coordinate with us before you spend too much time working on an implementation! -->