[Feature Request]: Add Field Title to text file output

### What would you like to happen?

The Text file output uses the field name as the name of the column in the header. This forces the fields to be named according to the desired output. A simple solution would be to prepend a Select before the output, renaming the fields. But any changes to the field names would then require changes in two places. In the Excel output you can specify the column title for the field and have everything in one place.

### Issue Priority

Priority: 3

### Issue Component

Component: Hop Gui

Start by locating the Text file output implementation and compare it with the Excel output's field-title handling. The work is done when text output fields can specify separate column titles without requiring renamed field names elsewhere.

Written by the indexing model from the issue text.