feat(oa): 新增供应商信息管理功能

- 新增供应商信息实体类OaSupplier及对应VO、BO类- 新增供应商信息Service接口与实现类
- 新增供应商信息Controller控制器
- 新增供应商信息Mapper接口与XML映射文件- 在项目进度步骤中添加供应商相关字段（supplierId、requirementFile等）- 完善供应商信息的增删改查及分页查询功能
- 支持供应商信息导出Excel功能

ruoyi-oa/src/main/resources/mapper/oa/OaSupplierMapper.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.ruoyi.oa.mapper.OaSupplierMapper">
+
+    <resultMap type="com.ruoyi.oa.domain.OaSupplier" id="OaSupplierResult">
+        <result property="supplierId" column="supplier_id"/>
+        <result property="supplierName" column="supplier_name"/>
+        <result property="contactPerson" column="contact_person"/>
+        <result property="contactPhone" column="contact_phone"/>
+        <result property="contactEmail" column="contact_email"/>
+        <result property="companyAddress" column="company_address"/>
+        <result property="supplierType" column="supplier_type"/>
+        <result property="status" column="status"/>
+        <result property="remark" column="remark"/>
+        <result property="createBy" column="create_by"/>
+        <result property="createTime" column="create_time"/>
+        <result property="updateBy" column="update_by"/>
+        <result property="updateTime" column="update_time"/>
+        <result property="delFlag" column="del_flag"/>
+    </resultMap>
+
+
+</mapper>