Restructure listener config in the config file

[WasiqB]

Description

• Create different config keys for each action so listener class can be mentioned in the config.
• Package name should be default, if listener class have common package name.

Proposed changes

"listeners": {
  // If common package for all listener class
  "package": "package.name",
  "type": {
    // If package is different for different actions
    "<action-name>": "<package-name>"
  }
}