add missing help files

public/fusio/help/action/file.md

@@ -0,0 +1,12 @@
+
+## File
+
+Path to a simple static json file. Fusio will simply forward the content to
+the client. This is helpful if you want to build fast an sample API with dummy 
+responses.
+
+### Example
+
+```
+/tmp/static.json
+```

public/fusio/help/action/http.md

@@ -0,0 +1,20 @@
+
+## HTTP
+
+Contains a HTTP url. Fusio automatically adds some additional headers to the 
+request which may be used by the endpoint i.e.:
+
+```http
+X-Fusio-Route-Id: 72
+X-Fusio-User-Anonymous: 1
+X-Fusio-User-Id: 4
+X-Fusio-App-Id: 3
+X-Fusio-App-Key: 1ba7b2e5-fa1a-4153-8668-8a855902edda
+X-Fusio-Remote-Ip: 127.0.0.1
+```
+
+### Example
+
+```
+http://foo.bar
+```

public/fusio/help/action/php.md

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+
+## PHP
+
+Path to a PHP file. Fusio simply includes this file on execution. In the 
+following an example implementation:
+
+```php
+<?php
+/**
+ * @var \Fusio\Engine\ConnectorInterface $connector
+ * @var \Fusio\Engine\ContextInterface $context
+ * @var \Fusio\Engine\RequestInterface $request
+ * @var \Fusio\Engine\Response\FactoryInterface $response
+ * @var \Fusio\Engine\ProcessorInterface $processor
+ * @var \Psr\Log\LoggerInterface $logger
+ * @var \Psr\SimpleCache\CacheInterface $cache
+ */
+
+// @TODO handle request and return response
+
+$response->build(200, [], [
+    'message' => 'Hello World!',
+]);
+```
+
+### Example
+
+```
+/tmp/Todo/collection.php"
+```

public/fusio/help/action/v8.md

@@ -1,22 +1,17 @@
 
 ## V8
 
-Fusio uses the V8 engine to offer a simple javascript API to implement the 
-endpoint logic. More detailed information about the [v8 API](http://www.fusio-project.org/documentation/v8)
-at the website.
+Contains javascript code. Fusio uses the internal v8 engine to execute the js 
+code. This is suitable for javascript developers who like to write the code in 
+[javascript](http://www.fusio-project.org/documentation/v8). Note the v8 
+implementation requires the [php v8](https://github.com/pinepain/php-v8) 
+extension.
 
 ### Example
 
-    var id = request.getUriFragment('id');
-    var connection = connector.get('mysql-connection');
-
-    var row = connection.fetchAssoc('SELECT * FROM my_table WHERE id = :id', {id: id});
-
-    if (row) {
-        response.setBody(row);
-    } else {
-        response.setStatusCode(404);
-        response.setBody({
-            message: "Entry not available"
-        });
-    }
+```javascript
+response.setStatusCode(200);
+response.setBody({
+    message: "Hello World!"
+});
+```

public/fusio/help/cronjob.md

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+
+## Cronjob
+
+A cronjob provides a way to execute an action in specific time intervals.
+
+