feat: add option to hide the login button from public-facing pages (#3922)

Co-authored-by: Henrique Dias <mail@hacdias.com>

frontend/src/components/Sidebar.vue

@@ -63,6 +63,7 @@
     </template>
     <template v-else>
       <router-link
+        v-if="!hideLoginButton"
         class="action"
         to="/login"
         :aria-label="$t('sidebar.login')"
@@ -124,6 +125,7 @@ import * as auth from "@/utils/auth";
 import {
   version,
   signup,
+  hideLoginButton,
   disableExternal,
   disableUsedPercentage,
   noAuth,
@@ -153,6 +155,7 @@ export default {
       return this.currentPromptName === "sidebar";
     },
     signup: () => signup,
+    hideLoginButton: () => hideLoginButton,
     version: () => version,
     disableExternal: () => disableExternal,
     disableUsedPercentage: () => disableUsedPercentage,