feat(models): rename ModelPublicUser to ModelPublicUsers and update references

* Update user-related models to use plural naming for consistency
* Add relationships to ModelPublicUsers in related models
* Adjust database migration and schema to reflect changes
* Remove deprecated ModelPublicUser

sql/migrate.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+echo "Migration script placeholder. Implement your migration logic here."

sql/schema.dbml

@@ -1,7 +1,7 @@
 // WhatsHooked Database Schema
 // This file defines the database schema for WhatsHooked Phase 2
 
-Table user {
+Table users {
   id varchar(36) [primary key, note: 'UUID']
   username varchar(255) [unique, not null]
   email varchar(255) [unique, not null]