[Bug]: Excel Input row numbering not intuitive

### Apache Hop version?

2.15

### Java version?

openjdk 17.0.16+8-LTS

### Operating system

macOS

### What happened?

*Microsoft Excel Input* starts numbering *Start row* at the index (0) while spreadsheet tools show (1) as the first row number. This for example would fail, because spreadsheet row (4) would be read, when configuring "Start row" (3):

vs.

Same goes for *Start column*, even though spreadsheet tools use letters instead of numbers. Ideally one could enter Letters as "Start column" instead.

I suggest this as a bugfix to be planned for release 3.0, as it introduces a breaking change.

### Issue Priority

Priority: 3

### Issue Component

Component: Transforms

Start with the Microsoft Excel Input transform and review how its Start row and Start column settings are interpreted. Compare their behavior with spreadsheet row numbering and column letters, then verify that the proposed indexing changes are consistent and account for the stated breaking change planned for release 3.0.

Written by the indexing model from the issue text.