Initial implementation of two-way communication with Fabric host (#1622)

* Listen to iframe messages. Test posting message.

* Plug new container message to show New Container dialog

* Rename message action to type

* Fix format

* Fix format

* Remove console.log() statement

* Rework fabric init flow. Implement open Collection Tab from fabric.

* Rename method to better match its purpose

* Update src/hooks/useKnockoutExplorer.ts

Use connectionString from message

Co-authored-by: Vsevolod Kukol <sevoku@microsoft.com>

* Fix format

* For openTab action open first collection if not specified. Clean up FabricContract.

* Reformat FabricContracts

* Highlight current node selection using them token

* Reformat

* Automatically expand nodes in resource tree if underlying database or collection is expanded. Fix AllowedOrigins. Cleanup code.

* Fix format

* Fix lint issue

* Don't show the home screen for Fabric (#1636)

* Fix formatting

* Database name to open can be overridden by value in session storage

---------

Co-authored-by: Vsevolod Kukol <sevoku@microsoft.com>

package.json

@@ -13,7 +13,7 @@
     "@babel/plugin-proposal-class-properties": "7.12.1",
     "@babel/plugin-proposal-decorators": "7.12.12",
     "@fluentui/react": "8.14.3",
-    "@fluentui/react-components": "9.30.1",
+    "@fluentui/react-components": "9.32.1",
     "@jupyterlab/services": "6.0.2",
     "@jupyterlab/terminal": "3.0.3",
     "@microsoft/applicationinsights-web": "2.6.1",
@@ -236,4 +236,4 @@
     "printWidth": 120,
     "endOfLine": "auto"
   }
-}
+}