feat: Add support for markdown in messages (#1642)

Co-authored-by: Pranav <pranav@chatwoot.com>

package.json

@@ -23,12 +23,14 @@
     "core-js": "3",
     "country-code-emoji": "^1.0.0",
     "date-fns": "^2.16.1",
+    "dompurify": "^2.2.6",
     "dotenv": "^8.0.0",
     "foundation-sites": "~6.5.3",
     "highlight.js": "~10.4.1",
     "ionicons": "~2.0.1",
     "js-cookie": "^2.2.1",
     "lodash.groupby": "^4.6.0",
+    "marked": "^1.2.7",
     "md5": "^2.3.0",
     "query-string": "5",
     "spinkit": "~1.2.5",