feat: Refactor company and job management to include company nature

- Added companyNature field to Company entity and updated related services and mappers.
- Removed jobNature field from Job and ESJobDocument entities as it is no longer needed.
- Updated CompanyController to handle current company information and synchronization of account codes.
- Enhanced CompanyServiceImpl to manage company nature changes and synchronize related job postings.
- Updated SQL migrations to add company nature field and associated business dictionary entries.
- Refactored job-related services to ensure they reflect the latest company nature information.

ruoyi-common/src/main/java/com/ruoyi/common/core/domain/entity/Company.java

@@ -54,6 +54,10 @@ public class Company extends BaseEntity
     @ApiModelProperty("性质")
     private String nature;
 
+    @Excel(name = "企业性质")
+    @ApiModelProperty("企业性质，对应业务字典 company_nature")
+    private String companyNature;
+
     @ApiModelProperty("招聘数量")
     private Integer totalRecruitment;