Implement Csv SyntaxHighlighter

[k3b]

⚠️ This issue respects the following points: ⚠️

• This is a enhancement/feature request. Not a bug or question.
• The topic is not already reported at Issues. (I've searched it).
• Markor is up to date. See Releases for the latest version. Updates are available from F-Droid and GitHub.
• The wanted feature/enhancement is not present in the latest development version (git master). (Please download and try the test version of Markor, named Marder. Don't worry; Markor and Marder appear as completely separate applications. You can install both side-by-side, and Markor's settings are not touched. If your desired feature is present, you don't need to open this issue. The change will be part of the next Markor update.)

Description

This is a follow up to #1980

As a (role) user that wants to edit csv on android
I want (feature) each column should be shown in a different unique color (SyntaxHighlighter)
so that (benefit) it is easy to find out which csv-data belongs to which colum/header

(Example taken from the Androidstudio Plugin https://github.com/SeeSharpSoft/intellij-csv-validator )

Information

Android version: 10
Device: LG
App Version: 2.10.7 (143)

Source

F-Droid

Format / File type

Something else (-> Additional info)

Additional info / Log

Markor uses regular expressions to implement syntax highlighting.

The CSV implementation uses a java matchers that also infers currentls used csv-field-delimiter-char and quoting-char

[k3b]

Current status Markor support for csv-files (as of 2023-03-15):

• Working prototype in k3b-s branch '1987-Implement_Csv_SyntaxHighlighter' that also contains implementation for issue Add fileformat CSV to view/export as a html table #1980
• There is a pending mergerequest Add new format: CSV - Preview text converter and Editor syntax highlighting #1987 #1988 for adding the changes to the next Markor release