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>

docs/index.md

@@ -0,0 +1,56 @@
+# L'Ami Fiduciaire — Project Documentation Index
+
+> Generated: 2026-03-08 | Scan Level: Quick | Workflow: initial_scan
+
+## Project Overview
+
+- **Type:** Monolith (full-stack web application)
+- **Primary Language:** PHP 8.4 (backend) + TypeScript (frontend)
+- **Architecture:** Server-Driven SPA (Laravel 12 + Inertia.js v2 + Vue 3)
+- **Database:** MySQL 8.4
+- **Domain:** Fiduciary/accounting firm client & document management
+
+## Quick Reference
+
+- **Backend:** Laravel 12, Fortify (auth), Eloquent ORM, Spatie packages
+- **Frontend:** Vue 3 + TypeScript, Tailwind CSS 4, shadcn-vue, Vite 7
+- **Entry Points:** `artisan` (CLI), `resources/js/app.ts` (frontend), `resources/js/ssr.ts` (SSR)
+- **Architecture Pattern:** Inertia.js server-driven SPA (no REST API layer)
+- **Dev Command:** `vendor/bin/sail composer run dev`
+
+## Generated Documentation
+
+- [Project Overview](./project-overview.md) — Purpose, features, domain model, tech stack summary
+- [Architecture](./architecture.md) — Architecture pattern, data models, routes, auth, frontend design, CI/CD
+- [Source Tree Analysis](./source-tree-analysis.md) — Annotated directory tree, critical folders
+- [Development Guide](./development-guide.md) — Setup, commands, testing, code quality, patterns
+- [API Contracts](./api-contracts.md) _(To be generated)_
+- [Data Models](./data-models.md) _(To be generated)_
+- [Component Inventory](./component-inventory.md) _(To be generated)_
+
+## Existing Documentation
+
+- [AGENTS.md](../AGENTS.md) — Laravel Boost AI guidelines, coding conventions, testing rules
+- [.github/workflows/lint.yml](../.github/workflows/lint.yml) — GitHub Actions linting pipeline
+- [.github/workflows/tests.yml](../.github/workflows/tests.yml) — GitHub Actions test pipeline
+
+## Getting Started
+
+1. Clone the repository
+2. Run `composer install && npm install`
+3. Copy `.env.example` to `.env` and generate key: `php artisan key:generate`
+4. Start Docker: `vendor/bin/sail up -d`
+5. Run migrations: `vendor/bin/sail artisan migrate`
+6. Start dev servers: `vendor/bin/sail composer run dev`
+7. Access the app at `http://localhost`
+
+## Key Entities
+
+| Entity | Description |
+|--------|-------------|
+| Workspace | Multi-tenant workspace for a firm |
+| User | Firm employee with workspace role |
+| Client | Business client of the firm |
+| Folder | Document dossier for a client |
+| FolderInvitation | Token-based external access link |
+| Message | In-folder communication |