WEB-442-feat: implement LightGallery document preview across all document tabs (#2847)

* feat: implement LightGallery document preview across all document tabs

feat(documents): add LightGallery preview with accessibility and error handling

* fix: add accessibility and performance improvements for document preview

fix(styles): replace undefined  variable with -river

Delete button title translated

src/assets/translations/en-US.json

@@ -3193,6 +3193,7 @@
       "No checker inbox data available for this search": "No checker inbox data available for this search.",
       "No client was found": "No client was found",
       "No data found": "No data found",
+      "NoDocuments": "No documents available.",
       "No loan locked available": "No loan locked available.",
       "No notifications": "No notifications",
       "No pending loan available for disbursal": "No pending loan available for disbursal.",
@@ -3449,7 +3450,8 @@
       "Write a note": "Write a note",
       "“Maker-Checker” principle requires every tasks": "The “Maker-Checker” principle requires every tasks to be completed by two people to reduce the chance of errors and misuse. One person initiates the process and the second completes it.",
       "Buy Down Fees": "Buy Down Fees",
-      "Undo Write-off Description": "This action will reverse the write-off transaction and restore the loan to its previous active status. Please provide a note explaining the reason for this action."
+      "Undo Write-off Description": "This action will reverse the write-off transaction and restore the loan to its previous active status. Please provide a note explaining the reason for this action.",
+      "UploadDocumentHint": "Upload a PDF or image to generate a preview."
     },
     "titles": {
       "Dashboard": "Dashboard",