fix(a11y): add inline task labels

frontend/src/assets/checkbox.svg

@@ -1,4 +1,5 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="18px" height="18px" viewBox="0 0 18 18" fill="none" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5">
+	<title>Checkbox</title>
 	<path d="M1,9 L1,3.5 C1,2 2,1 3.5,1 L14.5,1 C16,1 17,2 17,3.5 L17,14.5 C17,16 16,17 14.5,17 L3.5,17 C2,17 1,16 1,14.5 L1,9 Z" stroke-dasharray="60"></path>
 	<polyline points="1 9 7 14 15 4" stroke-dasharray="22" stroke-dashoffset="66"></polyline>
 </svg>

frontend/src/components/tasks/partials/SingleTaskInProject.vue

@@ -99,7 +99,6 @@
 					</template>
 				</Popup>
 
-
 				<span>
 					<span
 						v-if="task.attachments.length > 0"
@@ -151,6 +150,7 @@
 				class="favorite"
 				@click.stop="toggleFavorite"
 			>
+				<span class="tw-sr-only">{{ task.isFavorite ? $t('task.detail.actions.unfavorite') : $t('task.detail.actions.favorite') }}</span>
 				<Icon
 					v-if="task.isFavorite"
 					icon="star"