Add item creation and "get all" endpoints.

virtual-threads-app/src/main/resources/sql/init_database.sql

@@ -1,14 +0,0 @@
-\c virtual_threads_db;
-
-CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
-
-CREATE TABLE IF NOT EXISTS catalog (
-    id UUID NOT NULL PRIMARY KEY,
-    name VARCHAR NOT NULL
-);
-
-CREATE TABLE IF NOT EXISTS item (
-    id UUID NOT NULL PRIMARY KEY,
-    name VARCHAR NOT NULL,
-    shared_date TIMESTAMP WITH TIME ZONE NOT NULL
-);