Add configuration for sharing emoji packs

This adds the configuration interface for the endpoints introduced here.

src/api/emoji_packs.js

@@ -22,6 +22,15 @@ export async function reloadEmoji(host, token) {
   })
 }
 
+export async function createPack(host, token, name) {
+  return await request({
+    baseURL: baseName(host),
+    url: `/api/pleroma/emoji/packs/create/${name}`,
+    method: 'post',
+    headers: authHeaders(token)
+  })
+}
+
 export async function listPacks(host) {
   return await request({
     baseURL: baseName(host),