Better support for extensions

[eharris369]

In the project listing for an extension project it contains additional information which can be used to provide better support for extensions:

"extension": {
  "name": "appsodyExtension",
  "path": "/codewind-workspace/.extensions/codewind-appsody-extension",
  "version": "0.3.0",
  "description": "Appsody extension for Codewind",
  "projectType": "appsodyExtension",
  "commands": [],
  "detection": ".appsody-config.yaml",
  "templates": null,
  "config": {
    "containerAppRoot": "/project/user-app"
  }
},