add notebooks for analysis of gold paths and mixs triads

[wdduncan]

Do some analysis of how gold paths and mix triads are being used.
Put the analysis in Jupyter notebook.

cc @turbomam

[wdduncan]

@turbomam @cmungall on branch issue-3 I've add a simple jupyter notebook with a query that gets the counts.

I can do more with this later. I mainly wanted to get the branch going.

@turbomam can you add your notebook to his branch?

[turbomam]

I updated my notebook with

• stats for MIxS triads enriched for Gold paths
• stats for GOld paths enriched for MIxS triads
• sourcing data from @wdduncan's Gold/MIxS SQLite database

I must not understand this whole Draft Branch thing.

I added and committed my files to the issue-3 branch, but can push.

(venv) MAM@MAM-M74 gold-ontology % git status 
On branch issue-3
Your branch is ahead of 'origin/issue-3' by 1 commit.
  (use "git push" to publish your local commits)

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
    modified:   notebooks/gold-path-mixs-triad-counts.ipynb

no changes added to commit (use "git add" and/or "git commit -a")
(venv) MAM@MAM-M74 gold-ontology % git push  
ERROR: Permission to cmungall/gold-ontology.git denied to turbomam.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.