added only crash spec definition

[bryce-b]

Pulled the crash event spec out of the larger Mobile Event spec PR. The crash spec is agreed upon, while other events still need some discussion.

• [x] Create PR as draft
• [ ] Approval by at least one other agent
• [x] Mark as Ready for Review (automatically requests reviews from all agents and PM via CODEOWNERS)
  • Remove PM from reviewers if impact on product is negligible
  • Remove agents from reviewers if the change is not relevant for them
• [x] Merge after 2 business days passed without objections \ To auto-merge the PR, add /schedule YYYY-MM-DD to the PR description. /schedule 2023-02-06

[apmmachine]

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#### Build stats * Start Time: 2023-02-06T04:55:00.030+0000 * Duration: 3 min 57 sec