Feature/add accounts import export (#1635)

* Add accounts to activities export

* Add logic for importing accounts

* Update changelog

test/import/ok.json

@@ -1,10 +1,23 @@
 {
   "meta": {
-    "date": "2022-04-01T00:00:00.000Z",
+    "date": "2023-02-05T00:00:00.000Z",
     "version": "dev"
   },
+  "accounts": [
+    {
+      "accountType": "SECURITIES",
+      "balance": 2000,
+      "currency": "USD",
+      "id": "b2d3fe1d-d6a8-41a3-be39-07ef5e9480f0",
+      "isExcluded": false,
+      "name": "My Online Trading Account",
+      "platformId": null
+    }
+  ],
   "activities": [
     {
+      "accountId": "b2d3fe1d-d6a8-41a3-be39-07ef5e9480f0",
+      "comment": null,
       "fee": 0,
       "quantity": 0,
       "type": "BUY",
@@ -15,6 +28,8 @@
       "symbol": "MSFT"
     },
     {
+      "accountId": null,
+      "comment": null,
       "fee": 0,
       "quantity": 1,
       "type": "ITEM",
@@ -25,6 +40,8 @@
       "symbol": "Penthouse Apartment"
     },
     {
+      "accountId": "b2d3fe1d-d6a8-41a3-be39-07ef5e9480f0",
+      "comment": null,
       "fee": 0,
       "quantity": 5,
       "type": "DIVIDEND",
@@ -35,6 +52,8 @@
       "symbol": "MSFT"
     },
     {
+      "accountId": "b2d3fe1d-d6a8-41a3-be39-07ef5e9480f0",
+      "comment": "My first order",
       "fee": 19,
       "quantity": 5,
       "type": "BUY",