Add RMarkdown, Jupyter and HTML output example files to H2O Explain user guide

[exalate-issue-sync]

Let's use the default example on the [H2O Explain user guide page|https://docs.h2o.ai/h2o/latest-stable/h2o-docs/explain.html], and generate 4 files, which we can link to on the page, so that users can have a downloadable example of the code with the output.

• RMarkdown file & HTML output file
• Jupyter file & HTML output file

Maybe we can find a place to check in the files inside a new subfolder, and link to their location on github. I was thinking we could create a code or code-examples sub-directory inside: h2o-3/h2o-docs/src/product

[h2o-ops-ro]

JIRA Issue Details

Jira Issue: PUBDEV-8299
Assignee: Tomas Fryda
Reporter: Erin LeDell
State: Resolved
Fix Version: 3.34.0.1
Attachments: N/A
Development PRs: Available

[h2o-ops-ro]

Linked PRs from JIRA

#5651