chore: Allow more filetypes in uploads (#3557)

- Allowing the ability to upload more common file types like zip, Docx etc
- Fallback for image bubble when the image URL isn't available

fixes: #3270

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Nithin David <1277421+nithindavid@users.noreply.github.com>

app/javascript/dashboard/assets/scss/_foundation-settings.scss

@@ -45,6 +45,9 @@
 // 1. Global
 // ---------
 
+// Disable contrast warnings in Foundation.
+$contrast-warnings: false;
+
 $global-font-size: 10px;
 $global-width: 100%;
 $global-lineheight: 1.5;