Using --rename-notion-key-column, when the input value is identical to --payload-key-column, tool errors out

[IAmVigneswaran]

@arjunprakash027 A bug / error occurs when --rename-notion-key-column's input is identical to --rename-notion-key-column.

Example (Correct Way) :

--payload-key-column "Marker ID" --rename-notion-key-column "Marker ID" "NOT SAME ID"

When user tries this -

--payload-key-column "Marker ID" --rename-notion-key-column "Marker ID" "Marker ID"

We get -

ERROR: Error at division                                                                                                     
Traceback (most recent call last):
  File "csv2notion_neo/cli.py", line 58, in cli
  File "csv2notion_neo/cli_steps.py", line 79, in upload_rows
  File "tqdm/std.py", line 1181, in __iter__
  File "csv2notion_neo/utils_threading.py", line 38, in process_iter
  File "csv2notion_neo/utils_threading.py", line 38, in <genexpr>
  File "concurrent/futures/_base.py", line 437, in result
  File "concurrent/futures/_base.py", line 389, in __get_result
  File "concurrent/futures/thread.py", line 57, in run
  File "csv2notion_neo/utils_threading.py", line 26, in worker
  File "csv2notion_neo/notion_uploader.py", line 29, in upload_row
  File "csv2notion_neo/notion_uploader.py", line 40, in _get_db_row
  File "csv2notion_neo/notion_uploader.py", line 17, in key
KeyError: 'Marker ID'

I think we need to make the error message a little more friendlier.

Something like - Rename key column is identical to payload key column.