Editors: Added lexical editor for testing

Started basic playground for testing lexical as a new WYSIWYG editor.
Moved out tinymce to be under wysiwyg-tinymce instead so lexical is the
default, but TinyMce code remains.

package.json

@@ -41,11 +41,16 @@
     "@codemirror/state": "^6.3.3",
     "@codemirror/theme-one-dark": "^6.1.2",
     "@codemirror/view": "^6.22.2",
+    "@lexical/history": "^0.15.0",
+    "@lexical/html": "^0.15.0",
+    "@lexical/rich-text": "^0.15.0",
+    "@lexical/utils": "^0.15.0",
     "@lezer/highlight": "^1.2.0",
     "@ssddanbrown/codemirror-lang-smarty": "^1.0.0",
     "@ssddanbrown/codemirror-lang-twig": "^1.0.0",
     "codemirror": "^6.0.1",
     "idb-keyval": "^6.2.1",
+    "lexical": "^0.15.0",
     "markdown-it": "^14.1.0",
     "markdown-it-task-lists": "^2.1.1",
     "snabbdom": "^3.5.1",