[jupyter] support file(s) browsing

[linev]

Show JSROOT files browser when TBrowser instance created in jupyter
Also pythonization of TFile::Draw is changed - one can call f.Draw() directly to browse file.

import ROOT
f = ROOT.TFile.Open("https://root.cern/js/files/hsimple.root")
br = ROOT.TBrowser()

One will be able browse file and display all objects from it - very similar to JSROOT basic functionality like:

https://root.cern/js/latest/api.htm#url_syntax_open_file

Works by default only for small files - less than 10 MB. While file content will be embed in HTML page as base64 blob.
If necessary - also large file can be drawn when br.Draw("force") is called.

Also fix problem with TGeo drawing.

Update JSROOT which now also fully support RNtuple reading.

Refactor NotebookDrawer implementation - provide dedicated sub-classes for TCanvas, RCanvas, TFile, TGeo.

[github-actions]

Test Results

    22 files      22 suites   3d 6h 27m 6s ⏱️
 3 804 tests  3 801 ✅ 1 💤 2 ❌
76 538 runs  76 527 ✅ 9 💤 2 ❌

For more details on these failures, see this check.

Results for commit b9b8865.

♻️ This comment has been updated with latest results.

[dpiparo]

this is a great feature. How far are we from being able to embed this in Jupyterlab?

[dpiparo]

Also, wouldn't "Browse" be a better choice or even an external function or a magic?

[linev]

If Vincenzo not yet start reviewing PR - I can update it.
I have code where instantiation of the TBrowser shows content of all currently opened files.
Like:

import ROOT
f = ROOT.TFile.Open("https://root.cern/js/files/hsimple.root")
f2 = ROOT.TFile.Open("https://jsroot.gsi.de/files/geom/rootgeom.root")
br = ROOT.TBrowser()

And yes - one can change pythonization for TFile::Browse() instead of TFile::Draw().
For me crucial your acknowledge that construct like following is correct:

def _TFile_Draw(self, option: str = ""):
   """
   Draw the file.
   In the jupyter notebook redirects to display of HTML page
   """

   import ROOT

   if hasattr(ROOT, "_jupyroot"):
      ROOT._jupyroot.helpers.utils.addVisualObject(self, "tfile", option)
   else:
      self._Draw(option)