Update readme

README.md

@@ -1,17 +1,87 @@
 # Cycle ORM - Schema Provider
 
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-Schema Provider package provides multiple ways to build an ORM schema many sources
-via pipeline.
+[Cycle ORM](https://github.com/cycle/orm) uses an object implementing the `Cycle\ORM\SchemaInterface` interface as a schema.
+This schema can be constructed from a PHP array with a specific structure. The package at hand offers a comprehensive
+solution for building a schema from different sources. It includes a collection of providers that implements the
+`Cycle\Schema\Provider\SchemaProviderInterface` interface. These providers are grouped in the
+`Cycle\Schema\Provider\Support\SchemaProviderPipeline`.
 
-## Features
+This pipeline orchestrates the execution of providers in a predetermined order, one after another.
+If one of the providers returns the schema, subsequent providers are not executed.
 
-## Example
+## Requirements
+
+Make sure that your server is configured with the following PHP versions and extensions:
+
+- PHP >=8.0
+
+## Installation
+
+You can install the package via Composer:
+
+```bash
+composer require cycle/schema-provider
+```
+
+## Usage
+
+Let's explore a straightforward example of schema creation using this package. For example, we have a schema in
+two php files **schema1.php** and **schema2.php**. In this scenario, we can use the
+`Cycle\Schema\Provider\FromFilesSchemaProvider` to build the schema from multiple files. Before this provider,
+we can add a `Cycle\Schema\Provider\SimpleCacheSchemaProvider`, capable of caching the schema. Upon subsequent schema
+builds, this provider retrieves the schema from the cache, eliminating the need to build the schema using
+`FromFilesSchemaProvider`.
+
+```php
+use Cycle\ORM\Schema;
+use Cycle\Schema\Provider\FromFilesSchemaProvider;
+use Cycle\Schema\Provider\SimpleCacheSchemaProvider;
+use Cycle\Schema\Provider\Support\SchemaProviderPipeline;
+
+$pipeline = (new SchemaProviderPipeline($container))->withConfig([
+    SimpleCacheSchemaProvider::class => ['key' => 'cycle-schema'],
+    FromFilesSchemaProvider::class => ['files' => ['runtime/schema1.php', 'runtime/schema2.php']],
+]);
+
+$schema = new Schema($pipeline->read());
+```
+
+The `SimpleCacheSchemaProvider` requires an implementation of `Psr\SimpleCache\CacheInterface`, which must be defined
+in your container. It uses this interface to retrieve and store the schema array. Alternatively, you can use the
+`Cycle\Schema\Provider\PhpFileSchemaProvider`, which can save the schema to a PHP file.
+
+
+### Building DB schema from different providers
+
+To merge schema parts obtained from different providers, use `Cycle\Schema\Provider\Support\MergeSchemaProvider`.
+
+```php
+use Cycle\ORM\Schema;
+use Cycle\Schema\Provider\FromFilesSchemaProvider;
+use Cycle\Schema\Provider\SimpleCacheSchemaProvider;
+use Cycle\Schema\Provider\Support\MergeSchemaProvider;
+use Cycle\Schema\Provider\Support\SchemaProviderPipeline;
+
+$pipeline = (new SchemaProviderPipeline($container))->withConfig([
+    SimpleCacheSchemaProvider::class => ['key' => 'cycle-schema'],
+    MergeSchemaProvider::class => [
+        FromFilesSchemaProvider::class => ['files' => ['runtime/schema1.php', 'runtime/schema2.php']],
+        CustomSchemaProvider::class => ['some' => 'config'],
+    ],
+]);
+
+$schema = new Schema($pipeline->read());
+```
 
 ## License