🛂(frontend) secure download button

Blocknote download button opens the file in a new
tab, which could be not secure because of XSS attacks.
We replace the download button with a new one that
downloads the file instead of opening it in a new tab.
Some files are flags as unsafe (SVG / js / exe),
for these files we add a confirmation modal before
downloading the file to prevent the user from
downloading a file that could be harmful.
In the future, we could add other security layers
from this model, to analyze the file before
downloading it by example.

src/frontend/apps/e2e/__tests__/app-impress/assets/test.svg

@@ -0,0 +1,13 @@
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="100"
+  height="100"
+  viewBox="0 0 100 100"
+>
+  <circle cx="50" cy="30" r="20" fill="#3498db" />
+  <polygon
+    points="50,10 55,20 65,20 58,30 60,40 50,35 40,40 42,30 35,20 45,20"
+    fill="#f1c40f"
+  />
+  <text x="50" y="70" text-anchor="middle" fill="white">Hello svg</text>
+</svg>