add repository patter for chat

package.json

@@ -110,6 +110,7 @@
     "@logisticinfotech/ionic4-datepicker": "^1.4.4",
     "@microsoft/signalr": "^8.0.0",
     "@ng-bootstrap/ng-bootstrap": "^9.1.2",
+    "@ngrx/store": "^10.1.2",
     "@ngx-translate/core": "^13.0.0",
     "@ngxs/store": "^3.8.2",
     "@pdftron/pdfjs-express": "^8.0.1",
@@ -180,6 +181,7 @@
     "ngx-extended-pdf-viewer": "^13.0.0-alpha.2",
     "ngx-image-compress": "^11.0.3",
     "ngx-image-cropper": "^5.0.1",
+    "ngx-indexed-db": "^18.0.0",
     "ngx-letters-avatar": "^1.0.2",
     "ngx-socket-io": "^3.2.0",
     "pdfjs": "^2.4.6",