Add a new context dependent action for the README.md file generation

[makzef]

Is your feature request related to a problem? Please describe.

Add README.md file generation to the context actions, so that user can generate a README.md file wherever it can be generated depending on the clicked file or directory.

Describe the solution you'd like (*)

Similar features have already been developed, for example #978.

So the solution will be similar. To add new file generation action that depends on context:

1. create an action class that extends com.magento.idea.magento2plugin.actions.context.AbstractContextAction
2. register it in the plugin.xml file inside the MagentoContextBasedActionsGroup group
3. implement the isVisible method to define condition where to show this action
4. implement the getProperties method to specify properties that should be auto-populated from the known context (leave empty for user-defined values)

Additional context

ℹ️ New internal file template should be created.

Look at those files for examples:

• resources/fileTemplates/internal/Magento Web API XML.xml.ft
• resources/fileTemplates/internal/Magento Routes XML.xml.html
• src/com/magento/idea/magento2plugin/magento/files/ModuleWebApiXmlFile.java

Mainline branch: 4.4.0-develop

[m2-assistant]

Hi @makzef. Thank you for your report.
To speed up processing of this issue, make sure that you provided sufficient information.

Add a comment to assign the issue: @magento I am working on this

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[makzef]

@magento I am working on this