Refactor(medusa): Create a BaseEntity and SoftDeletableEntity base class for common columns (#1315)

* refactor(medusa): Move some column to a base entity to make it easier to add new models without forgetting some columns

* styles(medusa): Cleanup models

* fix(medusa): typings due to model typings update

* feat(medusa): Cleanup models

* fix(medusa): A model must not return the generateId as part of the entity

* fix(medusa): Plugin integration snapshot

* fix(medusa): Typings from discount-rule-migration scripts

* refactor(medusa): Introduct BaseEntity/SoftDeletableEntity that the entity extends

* styles(medusa): Fix models linting

* test(medusa): Fix integration plugin tests

* feat(medusa): Create generateEntityId standalong function utility and update config to properly supprt ts spec files

* feat(medusa): Update entities to use the new utils to generate and apply the id

* test(medusa): Fix test suits

* feat(medusa): Improve generateEntityId utility

packages/medusa/jest.config.js

@@ -9,6 +9,12 @@ module.exports = {
   //      useCoverage ? `jest-junit` : []
   //    )
   //  : [`default`].concat(useCoverage ? `jest-junit` : []),
+  globals: {
+    'ts-jest': {
+      tsConfig: 'tsconfig.spec.json',
+      isolatedModules: false
+    }
+  },
   transform: {
     "^.+\\.[jt]s?$": `../../jest-transformer.js`,
   },