Open books from Github (#10670)

* Add open book option in UI

* Add dropdowns option on dialog

* Add flow logic

* Fetch releases and validate URL

* Add class for github books and shared file books

* Change code structure

* Unblock local copy + stack overflows

* Download books from github

* Remove unused files

* Clean code and use the openNotebookFolder command to open remote book

* Checkpoint

* Refactor remote book dialog model to only hold data

* Remove ApiWrapper and refactor createlocalcopy method

* Use sinon js framework instead of typemoq for testing remotebookController

* Remove api wrapper

* Add some tests

* Add more tests and address pr comments

* Address PR comments

* Fix remotebook broken tests

* Add download location in output channel and use openBook command

* Address PR comments

* Fix typos, print error message and remove failing test

* Print error message

* Separate tests in different files

* Declare controller variable inside extension.tst

Co-authored-by: chlafreniere <hichise@gmail.com>

extensions/notebook/package.json

@@ -49,6 +49,11 @@
           "items": {
             "type": "string"
           }
+        },
+        "notebook.remoteBookDownloadTimeout": {
+          "type": "number",
+          "default": 60000,
+          "description": "%notebook.remoteBookDownloadTimeout.description%"
         }
       }
     },
@@ -228,6 +233,15 @@
           "dark": "resources/dark/open_notebook_inverse.svg",
           "light": "resources/light/open_notebook.svg"
         }
+      },
+      {
+        "command": "notebook.command.openRemoteBook",
+        "title": "%title.openRemoteJupyterBook%",
+        "category": "%books-preview-category%",
+        "icon": {
+          "dark": "resources/dark/open_notebook_inverse.svg",
+          "light": "resources/light/open_notebook.svg"
+        }
       }
     ],
     "languages": [
@@ -421,6 +435,9 @@
           "command": "notebook.command.openNotebookFolder",
           "when": "view == bookTreeView",
           "group": "navigation"
+        }, {
+          "command": "notebook.command.openRemoteBook",
+          "when": "view == bookTreeView"
         }
       ],
       "notebook/toolbar": [