Feat/note on order (#399)

* added NoteService and related endpoints && tests

* removed snapshots

* corrected error in service

* removed snapshot

* added the ability to note down author using a string

* updated model for note

* refactored to access logged in user

* added other user id option

* removed snapshot

* updated according to feedback

* removed snapshots

* reintroduced snapshots

* updated to snake case

* removed try catch from use-db

packages/medusa/src/migrations/1632220294687-add_notes.ts

@@ -0,0 +1,23 @@
+import { MigrationInterface, QueryRunner } from "typeorm"
+
+export class addNotes1632220294687 implements MigrationInterface {
+  name = "addNotes1632220294687"
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `CREATE TABLE "note" ("id" character varying NOT NULL, "value" character varying NOT NULL, "resource_type" character varying NOT NULL, "resource_id" character varying NOT NULL, "author_id" character varying, "created_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(), "updated_at" TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(), "deleted_at" TIMESTAMP WITH TIME ZONE, "metadata" jsonb, CONSTRAINT "PK_96d0c172a4fba276b1bbed43058" PRIMARY KEY ("id"))`
+    )
+    await queryRunner.query(
+      `CREATE INDEX "IDX_f74980b411cf94af523a72af7d" ON "note" ("resource_type") `
+    )
+    await queryRunner.query(
+      `CREATE INDEX "IDX_3287f98befad26c3a7dab088cf" ON "note" ("resource_id") `
+    )
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`DROP INDEX "IDX_3287f98befad26c3a7dab088cf"`)
+    await queryRunner.query(`DROP INDEX "IDX_f74980b411cf94af523a72af7d"`)
+    await queryRunner.query(`DROP TABLE "note"`)
+  }
+}