SUMMARY
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It would be awe some to allow designers to switch text directions freely.

CSS provides the following properties for this:
direction: to set dominant direction by either left-to-right (ltr) or right-to-left (rtl) for bi-directional text.
writing-mode: make text vertically.

STEPS TO REPRODUCE
(No way to reproduce, Krita have no interfaces for this)

OBSERVED RESULT
N/A

EXPECTED RESULT
N/A

SOFTWARE/OS VERSIONS
Windows: 10
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
Documentations at MDN Web Docs:
https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/writing-mode
https://developer.mozilla.org/en-US/docs/Web/CSS/direction