notebooks

As a follow-up to #11540, we would like to add metadata to as many examples as possible. This will not only make the examples more usable as they are right now, but it will also open up new possibilities to search for and crosslink examples.

For the purpose of this issue, 'standalone examples' are all .py files in these folders in this repository:

• examples/plotting/file
• `examples/mode

Describe the solution you'd like
Add types to Python codebase

What does your solution aim to solve?
Make it more explicit what arguments functions take and therefore make it easier to extend consume or refactor code.

Currently the only packages containing front-end unit tests are pipeline-editor and services.
It would be helpful to expand the unit test coverage across all other packages in Elyra, as well as add more tests to existing extensions.

This is an umbrella issue - subtasks can be delivered in separate PRs.

Pipeline Editor

• Test Pipeline Service (runtime types, runtimes, runtime images

The fix will be to call addCallbacks() either for all rows or whenever the table of schedules is modified in some way.

🚀 Feature

SVG images currently cannot be properly scaled in the generated HTML version.

Motivation

Embedded SVG images are automatically scaled to 100% of the notebook width. Using Markdown syntax or HTML adds the width and height arguments in the img tag in the generated HTML, which however seem to not work. For example, the following two expressions lead to SVG images with 10