@AkiR: Since you offered your work openly, I was so cheeky to put your parts together, so the less computer-savvy can download your plugin as an already installable package that can be imported via Krita’s standard plugin import function.
It can be downloaded via this link:
cursor_zoomer_plugin.zip ¹
You install plugins in Krita by clicking on “Tools” >> “Scripts” >> “Import Plugin from File” and in the dialog that opens, select the file you just downloaded, confirm the selection (click on the OK-Button), then confirm Krita’s activation request and the message that the plugin is installed, and restart Krita.
If you missed letting Krita activate the plugin during the steps above:
Then you have to search in Krita under ‘‘Settings’’ >> ‘‘Configure Krita’’ >> ‘‘Python Plugin Manager’’ for the plugin you just installed and activate it by checking the box in front of it. Then confirm with OK and restart Krita a second time to be able to use the plugin.
Michelist
¹ The report from VirusTotal for the plugin is found via this link.