mautrix-meta: init service

Acked-by: Rutherther <rutherther@proton.me>

nixos/doc/manual/release-notes/rl-2405.section.md

@@ -91,6 +91,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 - [Anki Sync Server](https://docs.ankiweb.net/sync-server.html), the official sync server built into recent versions of Anki. Available as [services.anki-sync-server](#opt-services.anki-sync-server.enable).
 The pre-existing [services.ankisyncd](#opt-services.ankisyncd.enable) has been marked deprecated and will be dropped after 24.05 due to lack of maintenance of the anki-sync-server softwares.
 
+- [mautrix-meta](https://github.com/mautrix/meta), a Matrix <-> Facebook and Matrix <-> Instagram hybrid puppeting/relaybot bridge. Available as services.mautrix-meta
+
 - [transfer-sh](https://github.com/dutchcoders/transfer.sh), a tool that supports easy and fast file sharing from the command-line. Available as [services.transfer-sh](#opt-services.transfer-sh.enable).
 
 - [Suwayomi Server](https://github.com/Suwayomi/Suwayomi-Server), a free and open source manga reader server that runs extensions built for [Tachiyomi](https://tachiyomi.org). Available as [services.suwayomi-server](#opt-services.suwayomi-server.enable).

nixos/modules/module-list.nix

@@ -648,6 +648,7 @@
   ./services/matrix/hebbot.nix
   ./services/matrix/maubot.nix
   ./services/matrix/mautrix-facebook.nix
+  ./services/matrix/mautrix-meta.nix
   ./services/matrix/mautrix-telegram.nix
   ./services/matrix/mautrix-whatsapp.nix
   ./services/matrix/mjolnir.nix