melmatcheq-lv2: move to by-name

pkgs/top-level/aliases.nix

···
   mailcore2 = throw "'mailcore2' has been removed due to lack of upstream maintenance."; # Added 2025-06-09
   mailctl = throw "mailctl has been renamed to oama"; # Added 2024-08-19
   mailman-rss = throw "The mailman-rss package was dropped since it was unmaintained."; # Added 2024-06-21
+  melmatcheq.lv2 = melmatcheq-lv2; # Added 2025-09-27
   mariadb_105 = throw "'mariadb_105' has been removed because it reached its End of Life. Consider upgrading to 'mariadb_106'."; # Added 2025-04-26
   mariadb_110 = throw "mariadb_110 has been removed from nixpkgs, please switch to another version like mariadb_114"; # Added 2024-08-15
   mariadb-client = hiPrio mariadb.client; # added 2019.07.28

pkgs/top-level/all-packages.nix

···
   mediaelch-qt5 = callPackage ../by-name/me/mediaelch/package.nix { qtVersion = 5; };
   mediaelch-qt6 = mediaelch;
 
-  melmatcheq.lv2 = callPackage ../applications/audio/melmatcheq.lv2 { };
-
   mendeley = libsForQt5.callPackage ../applications/office/mendeley {
     gconf = gnome2.GConf;
   };