docs: [draft] add jazzy tracepoint definition

[ymski]

Description

Draft PR for jazzy tracepoint.

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• I've confirmed the contribution guidelines.
• The PR is ready for review.

In-review checklist for the PR reviewers

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Post-review checklist for the PR author

The PR author must check the checkboxes below before merging.

• There are no open discussions or they are tracked via tickets.
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After all checkboxes are checked, anyone who has write access can merge the PR.

[github-actions]

Documentation URL: https://tier4.github.io/caret_doc/pr-352/
Modified URLs:

• https://tier4.github.io/caret_doc/pr-352/design/trace_points/initialization_trace_points/