chore: update .gitignore and build.gradle.kts for local server testing

- Added entries to .gitignore for local Paper test server and API documentation.
- Included the run-paper plugin in build.gradle.kts for local server execution.
- Configured runServer task with Minecraft version 1.21.4 for testing.

bin/main/data/mutes.yml

@@ -0,0 +1,39 @@
+# ╔══════════════════════════════════════════════════════════════════════════════╗
+# ║                              Mute Data                                     ║
+# ║                           Данные мутов                                    ║
+# ╚══════════════════════════════════════════════════════════════════════════════╝
+
+# НЕ РЕДАКТИРУЙТЕ ЭТОТ ФАЙЛ ВРУЧНУЮ!
+
+data-version: 1
+active-mutes: {}
+mute-history: {}
+
+# Пример структуры активных мутов:
+# active-mutes:
+#   550e8400-e29b-41d4-a716-446655440000:
+#     id: 1
+#     moderator: "admin-uuid"
+#     moderator-name: "AdminName"
+#     reason: "Спам в чате"
+#     start-time: 1640995200000
+#     end-time: 1640998800000
+#     duration: 3600000
+#     silent: false
+#     active: true
+#     server: "lobby"
+
+# Пример истории мутов:
+# mute-history:
+#   550e8400-e29b-41d4-a716-446655440000:
+#     - id: 1
+#       moderator: "admin-uuid"
+#       moderator-name: "AdminName"
+#       reason: "Первое нарушение"
+#       start-time: 1640995200000
+#       end-time: 1640998800000
+#       duration: 3600000
+#       unmute-reason: "Время истекло"
+#       unmute-moderator: null
+#       silent: false
+#       server: "lobby"