fix: add .csv support to file upload input

frontend/src/locale/en.json

@@ -71,7 +71,7 @@
       "remote": "Remote",
       "name": "Name",
       "choose": "Choose Files",
-      "info": "Please upload .pdf, .txt, .rst, .docx, .md, .zip limited to 25mb",
+      "info": "Please upload .pdf, .txt, .rst, .csv, .docx, .md, .zip limited to 25mb",
       "uploadedFiles": "Uploaded Files",
       "cancel": "Cancel",
       "train": "Train",

frontend/src/upload/Upload.tsx

@@ -259,6 +259,7 @@ function Upload({
       'application/zip': ['.zip'],
       'application/vnd.openxmlformats-officedocument.wordprocessingml.document':
         ['.docx'],
+      'text/csv': ['.csv'],
     },
   });