Add Catalan Language (#186)

- Added Catalan translation

src/main/resources/assets/modmenu/lang/ca_es.json

@@ -0,0 +1,36 @@
+{
+  "modmenu.title": "Mods",
+  "modmenu.loaded": "(%s carregat/s)",
+  "modmenu.config": "Editar configuració",
+  "modmenu.modsFolder": "Obrir carpeta de mods",
+  "modmenu.configsFolder": "Obrir carpeta de configuracions",
+  "modmenu.configure": "Configurar...",
+  "modmenu.modIdToolTip": "ID del Mod: %s",
+  "modmenu.website": "Lloc Web",
+  "modmenu.issues": "Problemes",
+  "modmenu.authorPrefix": "de %s",
+  "modmenu.search": "Buscar mods",
+  "modmenu.clientsideOnly": "Client",
+  "modmenu.deprecated": "Obsolet",
+  "modmenu.library": "Llibreria",
+  "modmenu.toggleFilterOptions": "Alternar opcions de filtres",
+  "modmenu.showLibraries": "Llibreries: %s",
+  "modmenu.showLibraries.true": "Mostrar",
+  "modmenu.showLibraries.false": "Amagar",
+  "modmenu.showingMods.a": "Mostrant %s mods",
+  "modmenu.showingMods.1": "Mostrant %s mod",
+  "modmenu.showingLibraries.a": "Mostrant %s llibreries",
+  "modmenu.showingLibraries.1": "Mostrant %s llibreria",
+  "modmenu.showingModsLibraries.a.a": "Mostrant %s mods i %s llibreries",
+  "modmenu.showingModsLibraries.a.1": "Mostrant %s mods i %s llibreria",
+  "modmenu.showingModsLibraries.1.a": "Mostrant %s mod i %s llibreries",
+  "modmenu.showingModsLibraries.1.1": "Mostrant %s mod i %s libreria",
+  "modmenu.sorting": "Ordenar: %s",
+  "modmenu.sorting.ascending": "A-Z",
+  "modmenu.sorting.decending": "Z-A",
+  "modmenu.minecraft": "Minecraft",
+  "modmenu.forge": "Forge",
+  "modmenu.dropConfirm" : "¿Vols copiar els següents mods al directori de mods?",
+  "modmenu.dropSuccessful.line1" : "Mods copiats amb èxit",
+  "modmenu.dropSuccessful.line2" : "Reinicia el joc per carregar els mods"
+}