Add support for mssql-to-postgresql migration

[sanamhub]

For this change, the project name should be changed as well and also we should consider other platform(s) migration which could be added in future. Initially I'm thinking names like

• db2db
• DbToDb
• DbMigrator
• NetDbMigrator
• DataWizard
• TheMigrator
• MigWiz

[bheemvennapureddy]

Looking forward for this