CreateJunctionTable checks for table and optional foreign key and better error handling

[Ayush-Dutt-Sharma]

Description 📣

Fixed --> Function CreateJunctionTable is not checking, if the table already exists or not #2277

Condition to check for existing table

Conditional Indexing on Foreign key

Added better Error Handling

Type ✨

• [ ✅] Bug fix

• [ ✅] I have read the contributing guide, agreed and acknowledged the code of conduct. 📝

[akhilmhdh]

@Ayush-Dutt-Sharma please remove the consoles also. Its not needed as i told knex providers a pretty elaborate error message when failing