feat(@angular-devkit/core): deprecate defaultProject

Author: filipesilva

packages/angular_devkit/core/src/workspace/workspace-schema.json

@@ -19,7 +19,7 @@
     },
     "defaultProject": {
       "type": "string",
-      "description": "The default project."
+      "description": "(DEPRECATED) The default project."
     },
     "cli": {
       "$ref": "#/definitions/tool",

packages/angular_devkit/core/src/workspace/workspace-schema.ts

@@ -20,6 +20,7 @@ export interface WorkspaceSchema {
    */
   newProjectRoot?: string;
   /**
+   * @deprecated From 7.0.0
    * The default project.
    */
   defaultProject?: string;

packages/angular_devkit/core/src/workspace/workspace.ts

@@ -140,6 +140,9 @@ export class Workspace {
     return workspaceProjectClone;
   }
 
+  /**
+   * @deprecated From 7.0.0
+   */
   getDefaultProjectName(): string | null {
     this._assertLoaded();