first commit:

- we have a static astro website under /website. It has the
implementation docs of the homepage/gaufre templates, and it handles the
few API endpoints (the gaufre js, backgrounds, logos)
- we have a vite app under /packages/integration. It has the react
components generating the homepage and the gaufre button, and their css.
Its used to generate an npm package

website/public/fonts/readme.md

@@ -0,0 +1,13 @@
+We use a subset of Marianne font because we know we use just a few characters for our list. This
+shrinks the font file size noticeably!
+
+Example command to use to generate the subset with glyphhanger:
+
+```
+glyphhanger \
+  --subset="./Marianne-Regular.woff2" \
+  --formats=woff2 \
+  --whitelist="DeskLaSuiteNumériqueMessagerieTchapResanaFranceTransfertContactsGristLePadWebConférencedel'ÉtatWebinaire  "
+```
+
+Assuming you have the Marianne-Regular.woff2 file (you can take it from the DSFR).