Started to write the documentation about actions

Author: sebprt

config.toml

@@ -68,6 +68,12 @@ hasChildren = true
   url = "core-concept/workflow"
   weight = 3
 
+  [[menu.main]]
+  parent = "Core concepts"
+  name = "Action"
+  url = "core-concept/action"
+  weight = 4
+
 [[menu.main]]
 weight = 3
 name = "Features"
@@ -180,6 +186,17 @@ hasChildren = true
    url = "connectivity/filtering"
    weight = 12
 
+[[menu.main]]
+name = "Actions"
+weight = 4
+hasChildren = true
+
+  [[menu.main]]
+  parent = "Actions"
+  name = "Custom"
+  url = "action/custom"
+  weight = 1
+
 [params]
 logo = "logo-web.svg"
 logo_white = "logo-web.svg"

content/action/custom/index.en.md

@@ -0,0 +1,32 @@
+---
+title: "Custom"
+date: 2023-07-06T15:54:13+02:00
+draft: false
+weight: 1
+---
+
+- [What is it ?](#what-is-it-)
+- [Installation](#installation)
+- [Usage](#usage)
+    - [Building an extractor](#building-an-extractor)
+    - [Building a transformer](#building-a-transformer)
+    - [Building a loader](#building-a-loader)
+---
+
+## Definition
+
+The custom connector allows you to use your own source code in your [actions](https://php-etl.github.io/documentation/core-concept/action/),
+allowing you to connect tools that are not supported by the standard distribution.
+
+## Installation
+
+This feature is already integrated into the Satellite package, so you can’t require it with the composer.
+
+## Usage
+
+First you need to [determine your services](../../feature/services) in your pipeline or workflow and then use the `use`
+option which allows you to define which service to use.
+
+```yaml
+    
+```

content/core-concept/action/index.end.md

@@ -0,0 +1,102 @@
+---
+title: "Action"
+date: 2023-07-06T15:06:20+02:00
+draft: false
+weight: 4
+---
+
+{{< feature-state for_mw_version="0.1" state="alpha" >}}
+
+- [What is it for?](#what-is-it-for)
+- [Installation](#installation)
+- [Basic Usage](#basic-usage)
+- [Advanced Usage](#advanced-usage)
+    - [Using expressions](#using-expressions)
+    - [Adding logger](#adding-logger)
+    - [Adding state](#adding-state)
+
+---
+
+> An action is a process that enables a task to be carried out before, during or at the end of the execution of a workflow.
+
+## What is it for?
+
+This package provides a process capable of executing actions.
+
+## Installation
+
+```shell
+composer require php-etl/action
+```
+
+## Basic usage
+
+At present, actions can only be used within a workflow. It is therefore not currently possible to launch an action on its own.
+
+```yaml
+workflow:
+  jobs:
+    - action: # ...
+    - pipeline: # ...
+    - action: # ...
+```
+
+## Advanced usage
+
+### Using expressions
+
+It's possible to use expressions in your pipeline using the `expression_language` option. To use these expressions,
+you need to use our customised Providers which provide the different expressions. For more information, please visit
+the [detailed documentation](../../feature/expression-language) of the language expressions.
+
+```yaml
+action:
+  expression_language:
+    - 'Kiboko\Component\Satellite\ExpressionLanguage\Provider'
+```
+
+### Adding logger
+
+It's possible to add a `logger` at each action of a workflow.
+
+For more details, go to the [detailed logger documentation](../../feature/logger).
+
+```yaml
+satellite:
+  # ...
+  workflow:
+    jobs:
+      - action:
+        # ...
+        logger:
+          channel: pipeline
+          destinations:
+            - elasticsearch:
+                level: warning
+                hosts:
+                  - http://user:password@elasticsearch.example.com:9200
+```
+
+### Adding state
+
+It's possible to add a `state` at each action of a workflow.
+
+For more details, go to the [detailed state documentation](../../feature/state)
+
+```yaml
+satellite:
+# ...
+   workflow:
+      jobs:
+      - action:
+        # ...
+        state:
+          destinations:
+            - rabbitmq:
+                host: rabbitmq.example.com
+                vhost: /
+                topic: foo.rejects
+```
+
+> As you can see, actions are only able to manage the logs and states of their processes,
+> but cannot deal with rejects that are contrary to pipelines.