Add Introduction wiki page

Author: diasbruno

wiki/Introduction.md

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+# Introduction
+
+`io.github.cl-sdk.wst` provides tools to help build web applications in Common Lisp.
+
+The project is intended to offer practical building blocks for web development rather than forcing a single rigid application structure. It focuses on making it easier to define application behavior, organize request handling, and compose reusable web-related features.
+
+## Goals
+
+The main goals of the project are:
+
+- provide a simple foundation for building web applications in Common Lisp
+- support modular application design
+- make common web concerns easier to manage
+- keep application code expressive and idiomatic
+
+## What this project includes
+
+Depending on how your application uses the library, the framework may help with areas such as:
+
+- routing requests to handlers
+- session management
+- resilience features such as circuit breakers
+- organizing web application components
+- supporting reusable feature modules
+
+## Intended audience
+
+This project is intended for Common Lisp developers who want:
+
+- a lightweight toolkit for web applications
+- reusable abstractions for server-side development
+- a foundation they can adapt to their own architecture
+
+## How to read this wiki
+
+If you are new to the project, start here and then continue with:
+
+1. **Routing** for request dispatch and handler organization
+2. **Features** for optional or reusable application capabilities
+3. specific feature pages such as **Circuit breaker** and **Session**
+
+## Project philosophy
+
+The framework is best understood as a set of composable tools. Instead of hiding application behavior behind too much convention, it aims to expose useful primitives that developers can combine in a way that matches their application needs.
+
+As you read the rest of the wiki, keep in mind that the exact integration style may vary depending on how the library is embedded in your application.