massive refactor toDrop cascadeStudio and add CadQuery + OpenSCAD

resolves #400

app/api/db/migrations/20210708100818_drop_cascade_tables/migration.sql

@@ -0,0 +1,31 @@
+/*
+  Warnings:
+
+  - You are about to drop the `Comment` table. If the table is not empty, all the data it contains will be lost.
+  - You are about to drop the `Part` table. If the table is not empty, all the data it contains will be lost.
+  - You are about to drop the `PartReaction` table. If the table is not empty, all the data it contains will be lost.
+
+*/
+-- DropForeignKey
+ALTER TABLE "Comment" DROP CONSTRAINT "Comment_partId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "Comment" DROP CONSTRAINT "Comment_userId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "Part" DROP CONSTRAINT "Part_userId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "PartReaction" DROP CONSTRAINT "PartReaction_partId_fkey";
+
+-- DropForeignKey
+ALTER TABLE "PartReaction" DROP CONSTRAINT "PartReaction_userId_fkey";
+
+-- DropTable
+DROP TABLE "Comment";
+
+-- DropTable
+DROP TABLE "Part";
+
+-- DropTable
+DROP TABLE "PartReaction";