Add version command, add more languages, update README.md

src/main/java/com/dfsek/terra/command/TerraCommand.java

@@ -24,7 +24,8 @@ public class TerraCommand extends Command {
             new StructureCommand(this),
             new ImageCommand(this),
             new GeometryCommand(this),
-            new FixChunkCommand(this));
+            new FixChunkCommand(this),
+            new VersionCommand(this));
 
     public TerraCommand(GaeaPlugin main) {
         super(main);

src/main/java/com/dfsek/terra/command/VersionCommand.java

@@ -0,0 +1,41 @@
+package com.dfsek.terra.command;
+
+import com.dfsek.terra.config.lang.LangUtil;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+import org.polydev.gaea.command.Command;
+
+import java.util.Collections;
+import java.util.List;
+
+public class VersionCommand extends Command {
+    public VersionCommand(Command parent) {
+        super(parent);
+    }
+
+    @Override
+    public String getName() {
+        return "version";
+    }
+
+    @Override
+    public List<Command> getSubCommands() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public boolean execute(@NotNull CommandSender sender, org.bukkit.command.@NotNull Command command, @NotNull String label, @NotNull String[] args) {
+        LangUtil.send("command.version", sender, getMain().getDescription().getVersion());
+        return true;
+    }
+
+    @Override
+    public int arguments() {
+        return 0;
+    }
+
+    @Override
+    public List<String> getTabCompletions(@NotNull CommandSender sender, @NotNull String alias, @NotNull String[] args) {
+        return Collections.emptyList();
+    }
+}