Implemented SessionManager and TextChannelService + several improvements and fixes

src/domain/sessionManager.schema.ts

@@ -0,0 +1,19 @@
+import {PublicUserData} from "./common.schema";
+import {GIF} from "./userService.schema";
+
+export interface Session {
+    userData: PersonalUserData
+    token: string
+}
+
+export interface ValidateSessionReq {
+    token: string
+}
+
+export interface ValidateSessionResp {
+    validationOk: boolean
+}
+
+export interface UpdateUserDataReq {
+    userid: string
+}