feat: 新增书籍及书籍分类管理模块（entity/controller/service）

src/modules/knowledge/entity/book-category.ts

@@ -0,0 +1,18 @@
+import { BaseEntity } from '../../base/entity/base';
+import { Column, Entity, Index } from 'typeorm';
+
+@Entity('knowledge_book_category')
+export class KnowledgeBookCategoryEntity extends BaseEntity {
+  @Index()
+  @Column({ comment: '分类名称', length: 100 })
+  name: string;
+
+  @Column({ comment: '排序', default: 0 })
+  sort: number;
+
+  @Column({ comment: '状态', dict: ['禁用', '启用'], default: 1 })
+  status: number;
+
+  @Column({ comment: '备注', nullable: true })
+  remark: string;
+}