[1pt] Create a schema.sql file for Book Class - Team member #1

[NayanKaran]

• Create a schema.sql file with tables that will be analogical to the structure of the classes that you created:
  • books table (add all properties and associations from the parent Item class as table columns)
  • labels table

Ref: Ruby group capstone - Catalog of my things
Ref: Ruby group capstone - Catalog of my things: divided requirements