feat: implement column info interfaces for database/sql

[ImpressionableRaccoon]

Feature Request

Implement these database/sql interfaces, it may be used by different integrations (like GORM, XORM ...)
https://github.com/golang/go/blob/79d4defa75a26dd975c6ba3ac938e0e414dfd3e9/src/database/sql/sql.go#L3196

Progress

• RowsColumnTypeScanType
• RowsColumnTypeDatabaseTypeName: Embedding internal/xsql package #508
• RowsColumnTypeLength
• RowsColumnTypeNullable: feat: implement RowsColumnTypeNullable interface for xsql rows #773
• RowsColumnTypePrecisionScale