add scoresaber feed command and websocket impl

src/main/java/cc/fascinated/bat/common/NumberUtils.java

@@ -19,6 +19,7 @@ public class NumberUtils {
     public static String formatNumberCommas(double number) {
         NumberFormat format = NumberFormat.getNumberInstance();
         format.setGroupingUsed(true);
+        format.setMaximumFractionDigits(2);
         return format.format(number);
     }
 }

src/main/java/cc/fascinated/bat/common/ScoreSaberUtils.java

@@ -0,0 +1,23 @@
+package cc.fascinated.bat.common;
+
+/**
+ * @author Fascinated (fascinated7)
+ */
+public class ScoreSaberUtils {
+    /**
+     * Gets the formatted difficulty of a song.
+     *
+     * @param difficulty the difficulty to format
+     * @return the formatted difficulty
+     */
+    public static String getFormattedDifficulty(int difficulty) {
+        return switch (difficulty) {
+            case 1 -> "Easy";
+            case 3 -> "Normal";
+            case 5 -> "Hard";
+            case 7 -> "Expert";
+            case 8 -> "Expert+";
+            default -> "Unknown";
+        };
+    }
+}

src/main/java/cc/fascinated/bat/common/TextChannelUtils.java

@@ -0,0 +1,31 @@
+package cc.fascinated.bat.common;
+
+import cc.fascinated.bat.service.DiscordService;
+
+/**
+ * @author Fascinated (fascinated7)
+ */
+public class TextChannelUtils {
+    /**
+     * Checks if a channel is valid
+     *
+     * @param id the id of the channel
+     * @return if the channel is valid
+     */
+    public static boolean isValidChannel(String id) {
+        if (id == null) {
+            return false;
+        }
+        return DiscordService.JDA.getTextChannelById(id) != null;
+    }
+
+    /**
+     * Gets the mention of a channel
+     *
+     * @param id the id of the channel
+     * @return the mention of the channel
+     */
+    public static String getChannelMention(String id) {
+        return "<#" + id + ">";
+    }
+}