Initial scoreboard objects

We need to make these nicer, but for internal use they're fine.

src/main/java/com/velocitypowered/proxy/data/scoreboard/Objective.java

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+package com.velocitypowered.proxy.data.scoreboard;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class Objective {
+    private final String id;
+    private String displayName;
+    private String type;
+    private final List<Team> teams = new ArrayList<>();
+    private final Map<String, Score> scores = new HashMap<>();
+
+    public Objective(String id) {
+        this.id = id;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public String getDisplayName() {
+        return displayName;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public List<Team> getTeams() {
+        return teams;
+    }
+
+    public Map<String, Score> getScores() {
+        return scores;
+    }
+
+    @Override
+    public String toString() {
+        return "Objective{" +
+                "id='" + id + '\'' +
+                ", displayName='" + displayName + '\'' +
+                ", type='" + type + '\'' +
+                ", teams=" + teams +
+                ", scores=" + scores +
+                '}';
+    }
+}

src/main/java/com/velocitypowered/proxy/data/scoreboard/Score.java

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+package com.velocitypowered.proxy.data.scoreboard;
+
+import java.util.Objects;
+
+public class Score {
+    private final String target;
+    private final int value;
+
+    public Score(String target, int value) {
+        this.target = target;
+        this.value = value;
+    }
+
+    public String getTarget() {
+        return target;
+    }
+
+    public int getValue() {
+        return value;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Score score = (Score) o;
+        return value == score.value &&
+                Objects.equals(target, score.target);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(target, value);
+    }
+
+    @Override
+    public String toString() {
+        return "Score{" +
+                "target='" + target + '\'' +
+                ", value=" + value +
+                '}';
+    }
+}

src/main/java/com/velocitypowered/proxy/data/scoreboard/Scoreboard.java

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+package com.velocitypowered.proxy.data.scoreboard;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Scoreboard {
+    private String name;
+    private byte position;
+    private final List<Objective> objectives = new ArrayList<>();
+
+    public Scoreboard() {
+
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public byte getPosition() {
+        return position;
+    }
+
+    public void setPosition(byte position) {
+        this.position = position;
+    }
+
+    public List<Objective> getObjectives() {
+        return objectives;
+    }
+
+    @Override
+    public String toString() {
+        return "Scoreboard{" +
+                "name='" + name + '\'' +
+                ", position=" + position +
+                ", objectives=" + objectives +
+                '}';
+    }
+}

src/main/java/com/velocitypowered/proxy/data/scoreboard/Team.java

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+package com.velocitypowered.proxy.data.scoreboard;
+
+import java.util.Collection;
+import java.util.HashSet;
+
+public class Team {
+    private final String id;
+    private String prefix;
+    private String suffix;
+    private byte flags;
+    private String nameTagVisibility;
+    private String collision;
+    private byte color;
+    private final Collection<String> players = new HashSet<>();
+
+    public Team(String id) {
+        this.id = id;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public String getPrefix() {
+        return prefix;
+    }
+
+    public void setPrefix(String prefix) {
+        this.prefix = prefix;
+    }
+
+    public String getSuffix() {
+        return suffix;
+    }
+
+    public void setSuffix(String suffix) {
+        this.suffix = suffix;
+    }
+
+    public byte getFlags() {
+        return flags;
+    }
+
+    public void setFlags(byte flags) {
+        this.flags = flags;
+    }
+
+    public String getNameTagVisibility() {
+        return nameTagVisibility;
+    }
+
+    public void setNameTagVisibility(String nameTagVisibility) {
+        this.nameTagVisibility = nameTagVisibility;
+    }
+
+    public String getCollision() {
+        return collision;
+    }
+
+    public void setCollision(String collision) {
+        this.collision = collision;
+    }
+
+    public byte getColor() {
+        return color;
+    }
+
+    public void setColor(byte color) {
+        this.color = color;
+    }
+
+    public Collection<String> getPlayers() {
+        return players;
+    }
+
+    @Override
+    public String toString() {
+        return "Team{" +
+                "id='" + id + '\'' +
+                ", prefix='" + prefix + '\'' +
+                ", suffix='" + suffix + '\'' +
+                ", flags=" + flags +
+                ", nameTagVisibility='" + nameTagVisibility + '\'' +
+                ", collision='" + collision + '\'' +
+                ", color=" + color +
+                ", players=" + players +
+                '}';
+    }
+}