Add Slovak language (#143)

* Create sk

Hi, I'm minecraft translator for slovak language. i have seen this project and i will use it mainly for dimensions generating. from my experience if it is on github then it is translatable (not really but mostly)... so i got into here and translated this

-Name: Slovenčina
-mc namespace: sk_SK
-short: SK
-in english: Slovak (language)

src/locales/sk.json

@@ -0,0 +1,47 @@
+{
+  "advancement": "Pokrok",
+  "button.add": "Pridať",
+  "button.collapse": "Skryť",
+  "button.expand": "Zobraziť",
+  "button.remove": "Vymazať",
+  "copy": "Kopírovať",
+  "dimension-type": "Typ dimenzie",
+  "dimension": "Dimenzia",
+  "download": "Stiahnuť",
+  "error.block_state.missing_property": "Chýba údaj kocky \"%0%\"",
+  "fields": "Polia",
+  "github": "GitHub",
+  "home": "Domov",
+  "item-modifier": "Úprava itemov",
+  "language": "Jazyk",
+  "loot-table": "Zoznam lupov",
+  "maximize": "Maximalizovať",
+  "minimize": "Minimalizovať",
+  "not_found.description": "Stránka ktorú ste vyhľadali neexistuje.",
+  "predicate": "Predikát",
+  "redo": "Znovu",
+  "reset": "Resetovať",
+  "settings": "Nastavenia",
+  "settings.fields.description": "Prispôsobiť nastavenia pokročilých polí",
+  "settings.fields.path": "Kontext",
+  "settings.fields.name": "Meno",
+  "share": "Zdieľať",
+  "title.generator": "%0% Generátor",
+  "title.home": "Data Packové Generátory",
+  "presets": "Prednastavenia",
+  "preview": "Vizualizovať",
+  "preview.show_density": "Zobraziť hustotu",
+  "preview.scale": "Veľkosť",
+  "preview.depth": "Hĺbka",
+  "preview.width": "Šírka",
+  "undo": "Späť",
+  "world": "Nastavenia sveta",
+  "worldgen/biome": "Bióm",
+  "worldgen/carver": "Carver",
+  "worldgen/feature": "Doplnky",
+  "worldgen/noise-settings": "Nastavenia šumu",
+  "worldgen/processor-list": "Zoznam procesorov",
+  "worldgen/structure-feature": "Doplnky štruktúr",
+  "worldgen/surface-builder": "Povrchový staviteľ",
+  "worldgen/template-pool": "Súbor šablon"
+}