feat: Add badge to leaf nodes

[lornakelly]

Closes #85

Summary

Add badge rendering and subtype extraction for leaf nodes

Changes

• Extract subtypes from Call, Run and Listen tasks
• Add TaskNodeBadge component
• Render known subtypes as text and unknown as info icon with tooltip
• Add Catch leaf node and TryCatch container node with placeholder content

[Copilot]

Pull request overview

This PR adds subtype “badges” to task leaf nodes in the React Flow diagram editor, along with subtype extraction helpers and initial support for TryCatch/Catch nodes to advance the agreed node styling/UX work.

Changes:

• Introduces task subtype extraction utilities for Call, Run, and Listen tasks and exports them from src/core.
• Adds badge rendering to leaf task nodes (text for known subtypes, info-icon with tooltip for unknown).
• Adds Catch as a leaf node (incl. config + tests) and TryCatch as a placeholder container node; adjusts default node sizing and demo diagram data.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/serverless-workflow-diagram-editor/tests/react-flow/nodes/taskNodeConfig.test.ts	Updates leaf node config coverage to include Catch.
packages/serverless-workflow-diagram-editor/tests/react-flow/nodes/Nodes.test.tsx	Extends node rendering tests for TryCatch/Catch and adds badge rendering tests.
packages/serverless-workflow-diagram-editor/tests/core/taskSubType.test.ts	Adds unit tests for subtype extraction utilities.
packages/serverless-workflow-diagram-editor/src/react-flow/nodes/taskNodeConfig.ts	Adds Catch leaf node config (color/icon/type label).
packages/serverless-workflow-diagram-editor/src/react-flow/nodes/Nodes.tsx	Adds TryCatch/Catch node types and implements TaskNodeBadge rendering.
packages/serverless-workflow-diagram-editor/src/react-flow/diagram/Diagram.tsx	Updates hardcoded demo nodes to include badges and tweaks positions/edge waypoints.
packages/serverless-workflow-diagram-editor/src/react-flow/diagram/Diagram.css	Adds badge styling and adjusts leaf node layout to accommodate badge + truncation.
packages/serverless-workflow-diagram-editor/src/core/taskSubType.ts	Implements getCallSubType, getRunSubType, getListenSubType, getTaskSubType.
packages/serverless-workflow-diagram-editor/src/core/index.ts	Exports the new taskSubType module.
packages/serverless-workflow-diagram-editor/src/core/autoLayout.ts	Increases default node width to 200.

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