fix: #WB-2452 Workaround selection with table

[Romu-C]

Implement a workaroun for a known issue with Tiptap
https://edifice-community.atlassian.net/browse/WB-2452

// The trailing node extension is necessary to pragmatically fix a problem
// with tables and table selections. When the last node in the document is a
// table and the last table cell is empty, then pressing - to select
// everyting only selects the very first node in the document. As soon as one
// of the conditions - table not the last node or last table cell not empty -
// is not met, - selects all, as expected.
// The Problem exists throughout browsers.
//
// More information here:
// - ueberdosis/tiptap#2401
// - ueberdosis/tiptap#3651