feat: refactor type definitions to export SequelizeBone, complete spell type definitions and fix index hints logic

[JimmyDaddy]

• refactor type definitions to export SequelizeBone for sequelize adaptor
• complete spell and hints definitions, fix hints logic
• virtual column should not be added to unset in case of custom getter cannot be serialize

class User {
 @Column()
 id: bigint;
 
 // custom will be ignored when toObject()/toJSON() execute, so make it a VIRTUAL column
 get custom(): string {
    return 'v';
 }
}

[JimmyDaddy]

virtual column should not be added to unset in case of custom getter cannot be serialize

class User {
 @Column()
 id: bigint;
 
 // custom will be ignored when toObject()/toJSON() execute, so make it a VIRTUAL column
 get custom(): string {
    return 'v';
 }
}

[JimmyDaddy]

class User {
 // types invokable should work
 @Column(DataTypes.STRING(12))
 id: bigint;
}