fix(project): only show create task cta when the user has permission to write to the project

Resolves https://community.vikunja.io/t/create-a-task-link-in-empty-project-for-read-only-share-links/3127

frontend/src/components/project/views/ProjectList.vue

@@ -37,14 +37,13 @@
 					<Nothing v-if="ctaVisible && tasks.length === 0 && !loading">
 						{{ $t('project.list.empty') }}
 						<ButtonLink
-							v-if="project.id > 0"
+							v-if="project.id > 0 && canWrite"
 							@click="focusNewTaskInput()"
 						>
 							{{ $t('project.list.newTaskCta') }}
 						</ButtonLink>
 					</Nothing>
 
-
 					<draggable
 						v-if="tasks && tasks.length > 0"
 						v-model="tasks"