Implement trivia welcome screen with category picker

src/main/java/wtf/beatrice/hidekobot/objects/fun/Dice.java

@@ -0,0 +1,45 @@
+package wtf.beatrice.hidekobot.objects.fun;
+
+import wtf.beatrice.hidekobot.util.RandomUtil;
+
+import java.util.UUID;
+
+public class Dice
+{
+    private final int sides;
+    private int value = 0;
+    private final UUID uuid;
+
+    public Dice(int sides)
+    {
+        this.sides = sides;
+        this.uuid = UUID.randomUUID();
+    }
+
+    public Dice(Dice old)
+    {
+        this.sides = old.sides;
+        this.value = old.value;
+        this.uuid = UUID.randomUUID();
+    }
+
+    public int getValue()
+    {
+        return value;
+    }
+
+    public int getSides()
+    {
+        return sides;
+    }
+
+    public void roll()
+    {
+        value = RandomUtil.getRandomNumber(1, sides);
+    }
+
+    public UUID getUUID()
+    {
+        return uuid;
+    }
+}

src/main/java/wtf/beatrice/hidekobot/objects/fun/TriviaCategory.java

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+package wtf.beatrice.hidekobot.objects.fun;
+
+public record TriviaCategory(String categoryName, int categoryId) {
+
+}

src/main/java/wtf/beatrice/hidekobot/objects/fun/TriviaQuestion.java

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+package wtf.beatrice.hidekobot.objects.fun;
+
+import java.util.List;
+
+public record TriviaQuestion(String question, String correctAnswer,
+                             List<String> wrongAnswers) {
+
+}

src/main/java/wtf/beatrice/hidekobot/objects/fun/TriviaScore.java

@@ -0,0 +1,31 @@
+package wtf.beatrice.hidekobot.objects.fun;
+
+import net.dv8tion.jda.api.entities.User;
+
+public class TriviaScore
+{
+
+    private final User user;
+    private int score = 0;
+
+    public TriviaScore(User user)
+    {
+        this.user = user;
+    }
+
+    public void changeScore(int add)
+    {
+        score += add;
+    }
+
+    public int getScore() { return score; }
+
+    public User getUser() { return user; }
+
+    @Override
+    public String toString()
+    {
+        return "[" + user.getAsTag() + "," + score + "]";
+    }
+
+}