Soft delete hopes to be compatible with unix（软删除希望兼容unix时间戳）

[shy1118999]

Is your feature request related to a problem? Please describe.

Soft delete hopes to be compatible with unix（软删除希望兼容unix时间戳）

Many existing pages need to be transferred to goframe for development, but the database cannot be migrated.
Nowadays, many old projects are using timestamp or deletion flag to implement soft deletion, and the ORM of goframe is hard-coded delete_at is null. In this way, during the migration process of old projects, soft deletion has to be disabled and soft deletion logic is added in the business logic. (delete_at = 0)

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现有很多页面需要转移到goframe进行开发，但是数据库不能做迁移
现在很多旧项目在使用时间戳或者删除flag实现的软删除，而goframe的ORM是写死的delete_at is null 这样在旧项目迁移过程中，就不得不禁用软删除 而在业务逻辑中添加软删除逻辑(delete_at = 0)

Describe the solution you'd like

It is recommended to add configuration items like GORM - Soft Delete

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建议增加像GORM一样的配置项 GORM Soft Delete

[gqcn]

@shy1118999 安排。

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Arranged by @shy1118999.

[gqcn]

#3293