Add sendStory command for posting stories via CLI and JSON-RPC

Implements SendStoryCommand to allow users to post stories through the
CLI and JSON-RPC interfaces. Command accepts an attachment file path
(required) and optional --no-replies flag to disable replies on the story.

Handles AttachmentInvalidException and IOException appropriately and
outputs results using SendMessageResultUtils.

Registered in Commands.java in alphabetical order.

src/main/java/org/asamk/signal/commands/Commands.java

@@ -52,6 +52,7 @@ public class Commands {
         addCommand(new SendPollTerminateCommand());
         addCommand(new SendReactionCommand());
         addCommand(new SendReceiptCommand());
+        addCommand(new SendStoryCommand());
         addCommand(new SendSyncRequestCommand());
         addCommand(new SendTypingCommand());
         addCommand(new SendUnpinMessageCommand());

src/main/java/org/asamk/signal/commands/SendStoryCommand.java

@@ -0,0 +1,57 @@
+package org.asamk.signal.commands;
+
+import net.sourceforge.argparse4j.impl.Arguments;
+import net.sourceforge.argparse4j.inf.Namespace;
+import net.sourceforge.argparse4j.inf.Subparser;
+
+import org.asamk.signal.commands.exceptions.CommandException;
+import org.asamk.signal.commands.exceptions.UnexpectedErrorException;
+import org.asamk.signal.commands.exceptions.UserErrorException;
+import org.asamk.signal.manager.Manager;
+import org.asamk.signal.manager.api.AttachmentInvalidException;
+import org.asamk.signal.output.OutputWriter;
+
+import java.io.IOException;
+
+import static org.asamk.signal.util.SendMessageResultUtils.outputResult;
+
+public class SendStoryCommand implements JsonRpcLocalCommand {
+
+    @Override
+    public String getName() {
+        return "sendStory";
+    }
+
+    @Override
+    public void attachToSubparser(final Subparser subparser) {
+        subparser.help("Post a story to your Story.");
+        subparser.addArgument("-a", "--attachment")
+                .required(true)
+                .help("Specify the file path to the image or video to post as a story.");
+        subparser.addArgument("--no-replies")
+                .action(Arguments.storeTrue())
+                .help("Disable replies on this story.");
+    }
+
+    @Override
+    public void handleCommand(
+            final Namespace ns,
+            final Manager m,
+            final OutputWriter outputWriter
+    ) throws CommandException {
+        final var attachment = ns.getString("attachment");
+        if (attachment == null || attachment.isEmpty()) {
+            throw new UserErrorException("An attachment is required for sending a story.");
+        }
+
+        final var noReplies = Boolean.TRUE.equals(ns.getBoolean("no-replies"));
+
+        try {
+            final var results = m.sendStory(attachment, !noReplies);
+            outputResult(outputWriter, results);
+        } catch (AttachmentInvalidException | IOException e) {
+            throw new UnexpectedErrorException("Failed to send story: " + e.getMessage() + " (" + e.getClass()
+                    .getSimpleName() + ")", e);
+        }
+    }
+}