feat: add new tab attribute that can be added to md links#1786

tishko0 wants to merge 2 commits intovnextIgniteUI/igniteui-xplat-docs:vnextfrom

ttonev/open-in-new-tab-cleanIgniteUI/igniteui-xplat-docs:ttonev/open-in-new-tab-cleanCopy head branch name to clipboard