add comment function

src-ui/src/app/data/paperless-document-comment.ts

@@ -0,0 +1,8 @@
+import { ObjectWithId } from './object-with-id'
+import { CommentUser } from './user-type'
+
+export interface PaperlessDocumentComment extends ObjectWithId {
+    created?: Date
+    comment?: string
+    user?: CommentUser
+} 

src-ui/src/app/data/paperless-environment.ts

@@ -0,0 +1,3 @@
+export interface PaperlessEnvironment {
+    value?: string;
+}

src-ui/src/app/data/user-type.ts

@@ -0,0 +1,7 @@
+import { ObjectWithId } from './object-with-id'
+
+export interface CommentUser extends ObjectWithId {
+    username: string
+    firstname: string
+    lastname: string
+}