REPL/IW editor only using a notebook text model (#214356)

* registered editor with notebook model

* migrated some stuff from Interactive Editor

* display notebook and input box

* dont always filter kernels by view

* fix restore

* implement some commands

* working copy recovery/discarding

* fix tear down

* do not show last cell

* simplify notebookOptions creation

* reset text model on execute

* fix run button

* set tab name

* use differentiated notebooktype to determine kernel

* allow registering notebooks as other priorities

* conditionally register actions

* move registerAction back to top level

* fix input box message

* naming

* dont register extra repl commands for now

* use jupyter-notebook notebook type

* set scratchpad on backup recovery

* remove unused method

extensions/ipynb/package.json

@@ -15,7 +15,8 @@
   ],
   "activationEvents": [
     "onNotebook:jupyter-notebook",
-    "onNotebookSerializer:interactive"
+    "onNotebookSerializer:interactive",
+    "onNotebookSerializer:repl"
   ],
   "extensionKind": [
     "workspace",