Add translations (#562)

Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/562
Co-authored-by: konrad <konrad@kola-entertainments.de>
Co-committed-by: konrad <konrad@kola-entertainments.de>

src/components/namespace/namespace-search.vue

@@ -1,7 +1,7 @@
 <template>
 	<multiselect
 		:loading="namespaceService.loading"
-		placeholder="Search for a namespace..."
+		:placeholder="$t('namespace.search')"
 		@search="findNamespaces"
 		:search-results="namespaces"
 		@select="select"

src/components/namespace/namespace-settings-dropdown.vue

@@ -5,7 +5,7 @@
 				:to="{ name: 'namespace.settings.archive', params: { id: namespace.id } }"
 				icon="archive"
 			>
-				Un-Archive
+				{{ $t('menu.unarchive') }}
 			</dropdown-item>
 		</template>
 		<template v-else>
@@ -13,25 +13,25 @@
 				:to="{ name: 'namespace.settings.edit', params: { id: namespace.id } }"
 				icon="pen"
 			>
-				Edit
+				{{ $t('menu.edit') }}
 			</dropdown-item>
 			<dropdown-item
 				:to="{ name: 'namespace.settings.share', params: { id: namespace.id } }"
 				icon="share-alt"
 			>
-				Share
+				{{ $t('menu.share') }}
 			</dropdown-item>
 			<dropdown-item
 				:to="{ name: 'list.create', params: { id: namespace.id } }"
 				icon="plus"
 			>
-				New list
+				{{ $t('menu.newList') }}
 			</dropdown-item>
 			<dropdown-item
 				:to="{ name: 'namespace.settings.archive', params: { id: namespace.id } }"
 				icon="archive"
 			>
-				Archive
+				{{ $t('menu.archive') }}
 			</dropdown-item>
 			<task-subscription
 				class="dropdown-item has-no-shadow"
@@ -46,7 +46,7 @@
 				icon="trash-alt"
 				class="has-text-danger"
 			>
-				Delete
+				{{ $t('menu.delete') }}
 			</dropdown-item>
 		</template>
 	</dropdown>