Define user instructions #3

src/module/lang.js

@@ -0,0 +1,16 @@
+import { GameState } from './util.js'
+
+/**
+ * Enum of all possible instructions.
+ * @type {object}
+ */
+const instructions = {
+  [GameState.ChoosingNumberOfShips]: 'Select the number of ships ',
+  [GameState.PlayerSetup]: 'Place your ships on the grid',
+  [GameState.PromptPlayerChange]: "It is your opponent's turn",
+  [GameState.PlayerTurn]: 'Select a cell to fire a missile',
+  [GameState.PlayerVictory]: 'You won!'
+  // and so on
+}
+
+export { instructions }