#336 Create command list generator in tools

- Add new conditional template tags [...] blabla [/...]
- Create logic for generating a list of commands

src/tools/commands/CommandPageCreater.java

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+package commands;
+
+import fr.xephi.authme.command.CommandArgumentDescription;
+import fr.xephi.authme.command.CommandDescription;
+import fr.xephi.authme.command.CommandInitializer;
+import fr.xephi.authme.command.CommandPermissions;
+import fr.xephi.authme.command.CommandUtils;
+import fr.xephi.authme.permission.PermissionNode;
+import utils.ANewMap;
+import utils.FileUtils;
+import utils.TagReplacer;
+import utils.ToolTask;
+import utils.ToolsConstants;
+
+import java.util.Map;
+import java.util.Scanner;
+import java.util.Set;
+
+public class CommandPageCreater implements ToolTask {
+
+    @Override
+    public String getTaskName() {
+        return "createCommandPage";
+    }
+
+    @Override
+    public void execute(Scanner scanner) {
+        final Set<CommandDescription> baseCommands = CommandInitializer.getBaseCommands();
+        final String template = FileUtils.readFromFile(ToolsConstants.TOOLS_SOURCE_ROOT
+            + "commands/command_entry.tpl.md");
+
+        StringBuilder commandsResult = new StringBuilder();
+        for (CommandDescription command : baseCommands) {
+            Map<String, String> tags = ANewMap
+                .with("command", CommandUtils.constructCommandPath(command))
+                .and("description", command.getDetailedDescription())
+                .and("arguments", formatArguments(command.getArguments()))
+                .and("permissions", formatPermissions(command.getCommandPermissions()))
+                .build();
+            commandsResult.append(TagReplacer.applyReplacements(template, tags));
+        }
+
+        FileUtils.generateFileFromTemplate(
+            ToolsConstants.TOOLS_SOURCE_ROOT + "commands/commands.tpl.md",
+            ToolsConstants.DOCS_FOLDER + "commands.md",
+            ANewMap.with("commands", commandsResult.toString()).build());
+    }
+
+    private static String formatPermissions(CommandPermissions permissions) {
+        if (permissions == null) {
+            return "";
+        }
+        String result = "";
+        for (PermissionNode node : permissions.getPermissionNodes()) {
+            result += node.getNode() + " ";
+        }
+        return result;
+    }
+
+    private static String formatArguments(Iterable<CommandArgumentDescription> arguments) {
+        StringBuilder result = new StringBuilder();
+        for (CommandArgumentDescription argument : arguments) {
+            String argumentName = argument.isOptional()
+                ? "[" + argument.getDescription() + "]"
+                : "<" + argument.getDescription() + ">";
+            result.append(argumentName).append(" ");
+        }
+        return result.toString();
+    }
+}

src/tools/commands/command_entry.tpl.md

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+{command}: {description} _{arguments}_
+[permissions]Permission: {permissions}[/permissions]

src/tools/commands/commands.tpl.md

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+## AuthMe commands
+You can use the following commands to use the functions of AuthMe:
+
+{commands}