Move Plex to API-driven plugin and fix NoClassDefFoundError on startup

server/src/main/java/dev/plex/command/annotation/CommandPermissions.java

@@ -0,0 +1,36 @@
+package dev.plex.command.annotation;
+
+import dev.plex.command.source.RequiredCommandSource;
+import dev.plex.rank.enums.Rank;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Storage for the command's permissions
+ */
+@Retention(RetentionPolicy.RUNTIME)
+public @interface CommandPermissions
+{
+    /**
+     * Minimum rank required
+     *
+     * @return Minimum rank required for the command
+     * @see Rank
+     */
+    Rank level() default Rank.IMPOSTOR;
+
+    /**
+     * Required command source
+     *
+     * @return The required command source of the command
+     * @see RequiredCommandSource
+     */
+    RequiredCommandSource source() default RequiredCommandSource.ANY;
+
+    /**
+     * The permission
+     *
+     * @return Permission of the command
+     */
+    String permission() default ""; // No idea what to put here
+}