Rework tooltips + complete them for relevant sections

[nikku]

Proposed Changes

Applies a number of adjustments to the tooltips:

Rules applied

• Tooltips should be short and concise
• Provide additional context information that cannot otherwise be sourced by field descriptions and other things
• Every section that is not self-explainatory has a tooltip - backed by / referencing the documentation
• Field level tooltips provide additional details - if needed

Try out

npx @bpmn-io/sr bpmn-io/bpmn-js-properties-panel#tooltip-reworks

Checklist

Ensure you provide everything we need to review your contribution:

• Contribution meets our definition of done
• Pull request establishes context
  • Link to related issue(s), i.e. Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}
  • Brief textual description of the changes
  • Screenshots or short videos showing UI/UX changes
  • Steps to try out, i.e. using the @bpmn-io/sr tool

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Related to bpmn-io/properties-panel#499

[Copilot]

Pull request overview

Reworks and extends Zeebe properties panel tooltips to provide more concise, documentation-backed guidance for groups and fields in the BPMN properties panel.

Changes:

• Refined existing tooltip copy (e.g., assignment definition, condition, called decision link title).
• Added/expanded tooltips for additional groups (e.g., headers, task/execution listeners, extension properties, output propagation, ad-hoc related groups).
• Improved conditional-event variable events tooltip to avoid duplicated text while clarifying default behavior.

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[nikku]

Find instructions to repeat the review here.

[barmac]

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