Use lexical-remark for Lexical<->Markdown conversions

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

package.json

@@ -58,7 +58,6 @@
     "@lexical/hashtag": "^0.11.2",
     "@lexical/link": "^0.11.2",
     "@lexical/list": "^0.11.2",
-    "@lexical/markdown": "^0.11.2",
     "@lexical/react": "^0.11.2",
     "@lexical/rich-text": "^0.11.2",
     "@lexical/selection": "^0.11.2",
@@ -138,6 +137,7 @@
     "intl-pluralrules": "^1.3.1",
     "leaflet": "^1.8.0",
     "lexical": "^0.11.2",
+    "lexical-remark": "^0.3.8",
     "libphonenumber-js": "^1.10.8",
     "line-awesome": "^1.3.0",
     "localforage": "^1.10.0",