refactor: standardize variable naming and file formatting

- Rename Quantity to quantity in BomItem for consistent naming convention
- Update references in MainModule to use lowercase quantity
- Add newlines at end of files for consistency
- Update vba_metadata.json with new source path and document module

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

VBA/Modules/BIPUploadModule.bas

@@ -419,4 +419,4 @@ Private Sub FormatBIPSheet(ws As Worksheet)
     ws.Columns(7).NumberFormat = "yyyy/mm/dd"
 
     On Error GoTo 0
-End Sub
+End Sub

VBA/Modules/MainModule.bas

@@ -275,7 +275,7 @@ Private Function CreateOutputRowArray(FullModel As String, _
         rowData(col) = item.Module: col = col + 1
         rowData(col) = item.code: col = col + 1
         rowData(col) = item.Name: col = col + 1
-        rowData(col) = item.Quantity: col = col + 1
+        rowData(col) = item.quantity: col = col + 1
         rowData(col) = item.category: col = col + 1
         rowData(col) = item.Code66: col = col + 1
     Else