implement i18next and i18next-scanner

client/public/locales/de/translation.json

@@ -0,0 +1,11 @@
+{
+  "Lean Game Server": "Lean-Spieleserver",
+  "<p>Game rules determine if it is allowed to skip levels and if the games runs checks to only allow unlocked tactics and theorems in proofs.</p><1>Note: \"Unlocked\" tactics (or theorems) are determined by two things: The set of minimal tactics needed to solve a level, plus any tactics you unlocked in another level. That means if you unlock <1>simp</1> in a level, you can use it henceforth in any level.</1><p>The options are:</p>": "<p>Die Spielregeln bestimmen ob es erlaubt ist, Levels zu überspringen und ob das Spiel überprüft welche Taktiken und Theoreme freigeschaltet sind und nur diese im Beweis akzeptiert.</p><1>Bemerkung: \"Freigeschaltete\" Taktiken (und Theoreme) werden durch zwei Faktoren bestimmt: The Menge der Taktiken die minimal notwending sind um den Level zu lösen und dazu die Menge aller Taktiken, die in einem anderen Level freigeschaltet wurden. Das bedeutet wenn <1>simp</1> in einem Level freigeschaltet wird, kann diese Taktik danach in jeglichen Levels verwendet werden.",
+  "Game Rules": "Spielregeln",
+  "levels": "Levels",
+  "tactics": "Taktiken",
+  "regular": "regulär",
+  "relaxed": "relaxed",
+  "none": "keine",
+  "Rules": "Regend"
+}

client/public/locales/en/translation.json

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+{
+  "Lean Game Server": "Lean Game Server",
+  "<p>Game rules determine if it is allowed to skip levels and if the games runs checks to only allow unlocked tactics and theorems in proofs.</p><1>Note: \"Unlocked\" tactics (or theorems) are determined by two things: The set of minimal tactics needed to solve a level, plus any tactics you unlocked in another level. That means if you unlock <1>simp</1> in a level, you can use it henceforth in any level.</1><p>The options are:</p>": "<p>Game rules determine if it is allowed to skip levels and if the games runs checks to only allow unlocked tactics and theorems in proofs.</p><1>Note: \"Unlocked\" tactics (or theorems) are determined by two things: The set of minimal tactics needed to solve a level, plus any tactics you unlocked in another level. That means if you unlock <1>simp</1> in a level, you can use it henceforth in any level.</1><p>The options are:</p>",
+  "Game Rules": "Game Rules",
+  "levels": "levels",
+  "tactics": "tactics",
+  "regular": "regular",
+  "relaxed": "relaxed",
+  "none": "none",
+  "Rules": "Rules"
+}