[Confluence] Audit of SVG

[aninde]

Description

Summary of SVG project.
After gathering all the necessary information put it on the Confluence / Projects.

Reference

https://github.com/handsontable/handsontable/issues?q=is%3Aissue+is%3Aopen+svg
https://handsontable.com/docs/8.0.0/CustomBorders.html

Chores

• description of the current state of customBorders
• description of the new customBorders (#17)
• summary of the issues reported by us (including separately by @warpech )
• summary of the issues reported by customers and users (ask @AMBudnik for the forum update)
• check package size
• verify with the current trends in browsers
• check is there a breaking change there?
• summary of testing
• summary of regression bugs found during testing
• additionally planning further tests