Expose API method for writing to application side (#4948)

src/browser/public/Terminal.ts

@@ -138,6 +138,9 @@ export class Terminal extends Disposable implements ITerminalApi {
   public focus(): void {
     this._core.focus();
   }
+  public input(data: string): void {
+    this._core.input(data);
+  }
   public resize(columns: number, rows: number): void {
     this._verifyIntegers(columns, rows);
     this._core.resize(columns, rows);