refactor: remove NFT avatar functionality

Removes avatar-settings component, avatar-visibility store, and all
avatar rendering from posts. Strips avatar from account JSON, renames
NFT gateway label to media IPFS gateway, removes Polygon RPC and
hide-avatars toggle. Deletes 6 avatar-related translation keys.

public/translations/id/default.json

@@ -78,7 +78,6 @@
   "show": "menunjukkan",
   "saved": "tersimpan",
   "paste_signature": "Tempelkan tanda tangan",
-  "chain_ticker": "Ticker blockchain",
   "wallet_address": "Alamat dompet",
   "copy": "salin",
   "copied": "disalin",
@@ -173,10 +172,7 @@
   "user_banned": "Pengguna diblokir untuk pos ini",
   "replies": "balasan",
   "links": "tautan",
-  "avatar": "avatar",
-  "token_address_whitelist": "Alamat token (<1>hanya daftar putih</1>)",
   "animated_gif": "GIF Animasi",
-  "hide_avatars": "Sembunyikan avatar",
   "pending": "Tertunda",
   "failed": "Gagal",
   "add": "Tambahkan",
@@ -198,7 +194,6 @@
   "last_bumped": "Terakhir bump",
   "fit_expanded_images_to_screen": "Sesuaikan gambar yang diperluas ke layar",
   "fit_expanded_images_to_screen_tip": "Batasi gambar yang diperluas baik pada lebar maupun tinggi browser",
-  "hide_avatars_tip": "Jangan tampilkan avatar di sebelah nama pengguna",
   "choose_file": "Pilih Berkas",
   "uploading": "mengupload...",
   "no_file_chosen": "Tidak ada file yang dipilih",
@@ -231,7 +226,6 @@
   "moderator_of_this_board": "Pengguna ini adalah moderator papan ini",
   "administrator_of_this_board": "Pengguna ini adalah administrator papan ini",
   "copy_content_id": "salin ID konten",
-  "delete_avatar": "Hapus avatar",
   "updates": "Pembaruan",
   "downloading_board": "mengunduh forum",
   "subscriptions_subtitle": "Anda berlangganan {{count}} boards",