Translation strings added (#3304)

* Update: `pages/items/_id` toast messages

* Update: account modal strings

* Update: audio file data modal strings

* Update: sleep timer set string

* Update: loading indicator string

* Update: lazy book card strings

* Reorder keys

* Fix: syntax error in LazyBookCard

* Fix: json ordering

* Fix: fix double message definition

* Update: login form toast strings

* Update: batch delete toast

* Update: collection add toast messages

* Replace: toasts in BookShelfToolbar

* Update: playlist edit toasts

* Update: Details tab

* Add: title required string

* Update: ereader toasts

* Update: author toasts, title and name required toasts

* Clean up "no updates" strings

* Change: slug strings

* Update: cover modal toasts

* Change: cancel encode toasts

* Change: failed to share toasts

* Simplify: "renameFail" and "removeFail" toasts

* Fix: ordering

* Change: chapters remove toast

* Update: notification strings

* Revert: loading indicator (error in browser)

* Update: collectionBooksTable toast

* Update: "failed to get" strings

* Update: backup strings

* Update: custom provider strings

* Update: sessions strings

* Update: email strings

* Update sort display translation strings, update podcast episode queue strings to use translation

* Fix loading indicator please wait translation

* Consolidate translations and reduce number of toasts

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Co-authored-by: advplyr <advplyr@protonmail.com>

client/components/modals/SleepTimerModal.vue

@@ -15,7 +15,7 @@
         </template>
         <form class="flex items-center justify-center px-6 py-3" @submit.prevent="submitCustomTime">
           <ui-text-input v-model="customTime" type="number" step="any" min="0.1" :placeholder="$strings.LabelTimeInMinutes" class="w-48" />
-          <ui-btn color="success" type="submit" :padding-x="0" class="h-9 w-12 flex items-center justify-center ml-1">Set</ui-btn>
+          <ui-btn color="success" type="submit" :padding-x="0" class="h-9 w-18 flex items-center justify-center ml-1">{{ $strings.ButtonSubmit }}</ui-btn>
         </form>
       </div>
       <div v-if="timerSet" class="w-full p-4">