OZG-400 add icon for subnav

goofy-client/apps/goofy/src/styles/main.scss

 @import "~material-design-icons-iconfont/dist/material-design-icons.css";
+//@import url("https://fonts.googleapis.com/icon?family=Material+Icons|Material+Icons+Outlined");
 @import "~typeface-roboto/index.css";
 
 @import "abstracts/variables";

goofy-client/libs/ui/src/lib/assets/account_outline.svg

+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 0 24 24" width="24px" fill="#000000"><path d="M0 0h24v24H0V0z" fill="none"/><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zM7.07 18.28c.43-.9 3.05-1.78 4.93-1.78s4.51.88 4.93 1.78C15.57 19.36 13.86 20 12 20s-3.57-.64-4.93-1.72zm11.29-1.45c-1.43-1.74-4.9-2.33-6.36-2.33s-4.93.59-6.36 2.33C4.62 15.49 4 13.82 4 12c0-4.41 3.59-8 8-8s8 3.59 8 8c0 1.82-.62 3.49-1.64 4.83zM12 6c-1.94 0-3.5 1.56-3.5 3.5S10.06 13 12 13s3.5-1.56 3.5-3.5S13.94 6 12 6zm0 5c-.83 0-1.5-.67-1.5-1.5S11.17 8 12 8s1.5.67 1.5 1.5S12.83 11 12 11z"/></svg>
\ No newline at end of file

goofy-client/libs/ui/src/lib/icon/icon.model.ts

 export enum Icons {
 	INCOMING = 'incoming',
 	edit = 'edit',
-	stamp = 'stamp'
+	stamp = 'stamp',
+	account_outline = 'account_outline'
 }

goofy-client/libs/user-profile/src/lib/assign-user-profile-button-container/assign-user-profile-button-container.component.html

-<goofy-client-icon-button-with-spinner *ngIf="vorgang | hasLink: linkRel.ASSIGN" data-test-id="assign-user-profile-button"
-	icon="assignment_ind" toolTip="Bearbeiter zuordnen"
-	(clickEmitter)="showUserProfileSearch()">
+<goofy-client-icon-button-with-spinner
+		*ngIf="vorgang | hasLink: linkRel.ASSIGN"
+		svgIcon="account_outline"
+		toolTip="Bearbeiter zuordnen"
+		(clickEmitter)="showUserProfileSearch()"
+		data-test-id="assign-user-profile-button">
 </goofy-client-icon-button-with-spinner>