fix: scope cursor caret CSS to be more specific (#1492)

Author: nperez0111

packages/core/src/editor/editor.css

@@ -86,19 +86,19 @@ Tippy popups that are appended to document.body directly
   opacity: 0.001;
 }
 
-.collaboration-cursor__base {
+.bn-editor .collaboration-cursor__base {
   position: relative;
 }
 
-.collaboration-cursor__caret {
+.bn-editor .collaboration-cursor__base .collaboration-cursor__caret {
   position: absolute;
   width: 2px;
   top: 1px;
   bottom: -2px;
   left: -1px;
 }
 
-.collaboration-cursor__label {
+.bn-editor .collaboration-cursor__base .collaboration-cursor__label {
   pointer-events: none;
   border-radius: 0 1.5px 1.5px 0;
   font-size: 12px;
@@ -119,7 +119,9 @@ Tippy popups that are appended to document.body directly
   transition: all 0.2s;
 }
 
-.collaboration-cursor__base[data-active] .collaboration-cursor__label {
+.bn-editor
+  .collaboration-cursor__base[data-active]
+  .collaboration-cursor__label {
   color: #0d0d0d;
   max-height: 1.1rem;
   max-width: 20rem;