Fix #3420 Analyze in notebook doesn't include text (#3482)

- Add edit API that can be used in the extension
- Separated document and editor classes out since this is the point those get big. I can refactor back in if needed to ease code review
- Based this off text editing APIs but tweaked for the fact this is a cell/array based set of edits

src/sqltest/parts/notebook/common.ts

@@ -11,6 +11,7 @@ import { Event, Emitter } from 'vs/base/common/event';
 import { INotebookModel, ICellModel, IClientSession, IDefaultConnection } from 'sql/parts/notebook/models/modelInterfaces';
 import { NotebookChangeType, CellType } from 'sql/parts/notebook/models/contracts';
 import { INotebookManager } from 'sql/services/notebook/notebookService';
+import { ISingleNotebookEditOperation } from 'sql/workbench/api/common/sqlExtHostTypes';
 
 export class NotebookModelStub implements INotebookModel {
     constructor(private _languageInfo?: nb.ILanguageInfo) {
@@ -67,6 +68,9 @@ export class NotebookModelStub implements INotebookModel {
     saveModel(): Promise<boolean> {
         throw new Error('Method not implemented.');
     }
+    pushEditOperations(edits: ISingleNotebookEditOperation[]): void {
+        throw new Error('Method not implemented.');
+    }
 }
 
 export class NotebookManagerStub implements INotebookManager {