feat: app name on environment variable

.env

···
+VITE_APP_NAME=Aglais

src/vite-env.d.ts

···
 /// <reference types="@atcute/bluemoji/lexicons" />
 
 interface ImportMetaEnv {
+	readonly VITE_APP_NAME: string;
+
 	readonly VITE_DEV_SERVER_PORT?: string;
 	readonly VITE_CLIENT_URI: string;
 	readonly VITE_OAUTH_CLIENT_ID: string;