Adding event bindings

Adding event bindings.

Procedure

1. Add an events section in the devfile, containing a list of preStart and postStart commands.

   v2.0

   devfile.yaml

   components:
     - container:
         name: "copier"
         image: ''
     - container:
         name: "maven"
         image: ''
     - plugin:
         id: theia
   Commands:
   containerBuild:
   reference:
   composite:
   
   
     - exec:
         name: "copyNeededFiles"
         component: "copier"
         commandLine: "cp somefile"
     - exec:
         name: "buildAll"
         component: "maven"
         commandLine: "mvn ..."
     - vsCodeTask:
         name: "openFile"
         component: "theia"
   events:
     preStart:
       - "copyNeededFiles"
     postStart:
       - "buildAll"
       - "openFile"
   

Additional Resources

• See corresponding issue.