feat: add configuration for maximum number of uploaded files

--bug=1061639 --user=刘瑞斌 【知识库】知识库的最多上传文件数设置不生效 https://www.tapd.cn/62980211/s/1771564

apps/maxkb/settings/base.py

@@ -168,6 +168,10 @@ TIME_ZONE = CONFIG.get_time_zone()
 USE_I18N = True
 
 USE_TZ = True
+
+# 文件上传配置
+DATA_UPLOAD_MAX_NUMBER_FILES = 1000
+
 # 支持的语言
 LANGUAGES = [
     ('en', 'English'),