✨(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- Helm sources are outdated.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/mail/bin/html-to-plain-text

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -eo pipefail
+# Run html-to-text to convert all html files to text files
+DIR_MAILS="../backend/core/templates/mail/"
+
+if [ ! -d "${DIR_MAILS}" ]; then
+  mkdir -p "${DIR_MAILS}";
+fi
+
+if [ ! -d "${DIR_MAILS}"html/ ]; then
+  mkdir -p "${DIR_MAILS}"html/;
+  exit;
+fi
+
+for file in "${DIR_MAILS}"html/*.html;
+    do html-to-text -j ./html-to-text.config.json < "$file" > "${file%.html}".txt; done;
+
+if [ ! -d "${DIR_MAILS}"text/ ]; then
+  mkdir -p "${DIR_MAILS}"text/;
+fi
+
+mv "${DIR_MAILS}"html/*.txt "${DIR_MAILS}"text/;

src/mail/bin/mjml-to-html

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+# Run mjml command to convert all mjml templates to html files
+DIR_MAILS="../backend/core/templates/mail/html/"
+
+if [ ! -d "${DIR_MAILS}" ]; then
+  mkdir -p "${DIR_MAILS}";
+fi
+mjml mjml/*.mjml -o "${DIR_MAILS}";