Add option for a custom write function.

[ghost]

• Added new AutoOptions property write?: (tableData:TableData,options:AutoOptions)=>Promise<void>;.
• Added tests/write.test.js
• Requires a change to address issue Added missing dialects to fix ts compile with sequelize 6.29.  #642
  • What I did to run my test was just to pass sqliteOptions to all new, un-implemented dialects, e.g. db2: sqliteOptions, snowflake: sqliteOptions, oracle: sqliteOptions.

[ghost]

OK I should have realized that you can just do a custom writer by calling build and relate on your SequelizeAuto instance instead of calling run.