feat: L'Ami Fiduciaire V1.0.0 — full codebase with Story 0.1 complete

Initial commit of the L'Ami Fiduciaire SaaS platform built on Laravel 12,
Vue 3, Inertia.js 2, and Tailwind CSS 4.

Story 0.1 (rename folders to declarations in database) is implemented and
code-reviewed: migration, rollback, and 6 Pest tests all passing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Actions/Fortify/CreateNewUser.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Actions\Fortify;
+
+use App\Concerns\PasswordValidationRules;
+use App\Concerns\ProfileValidationRules;
+use App\Models\User;
+use Illuminate\Support\Facades\Validator;
+use Laravel\Fortify\Contracts\CreatesNewUsers;
+
+class CreateNewUser implements CreatesNewUsers
+{
+    use PasswordValidationRules, ProfileValidationRules;
+
+    /**
+     * Validate and create a newly registered user.
+     *
+     * @param  array<string, string>  $input
+     */
+    public function create(array $input): User
+    {
+        Validator::make($input, [
+            ...$this->profileRules(),
+            'password' => $this->passwordRules(),
+        ])->validate();
+
+        return User::create([
+            'name' => $input['name'],
+            'email' => $input['email'],
+            'password' => $input['password'],
+        ]);
+    }
+}