fix: temporarily revert DM collapse functionality

[paula-stacho]

Description

This is a revert commit of 52f148e
(without package.json and package-lock.json as we're only moving forward with the versions 😁 )
We have a couple of things we need to resolve before the functionality is usable.

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added
• If this change updates the UI, screenshots/videos are added and a design review is requested
• I have signed the MongoDB Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)

Motivation and Context

• Bugfix
• New feature
• Dependency update
• Misc

Open Questions

Dependents

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)

[Copilot]

Pull Request Overview

This PR reverts the DM (Data Model) collapse functionality that was previously introduced. The changes remove the ability to expand/collapse collections in the data modeling diagram view by eliminating the isExpanded property and related toggle functionality throughout the codebase.

Key Changes:

• Removed isExpanded property from collection data structures and schemas
• Eliminated toggleCollectionExpanded action and ToggleExpandCollection edit type
• Simplified field rendering logic to always show all fields regardless of depth
• Cleaned up test fixtures and test cases to remove isExpanded references

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/compass-data-modeling/test/fixtures/data-model-with-relationships.json	Removed isExpanded: false properties from test fixture collections
packages/compass-data-modeling/src/utils/nodes-and-edges.ts	Removed expand/collapse logic from field generation functions and simplified type definitions
packages/compass-data-modeling/src/utils/nodes-and-edges.spec.ts	Updated test expectations to reflect removal of path property and function rename
packages/compass-data-modeling/src/store/diagram.ts	Removed toggleCollectionExpanded action and isExpanded property handling
packages/compass-data-modeling/src/store/diagram.spec.ts	Removed isExpanded from test data model definitions
packages/compass-data-modeling/src/store/apply-edit.ts	Removed ToggleExpandCollection edit case handler
packages/compass-data-modeling/src/store/analysis-process.ts	Removed isExpanded from initial layout generation
packages/compass-data-modeling/src/services/data-model-storage.ts	Removed isExpanded from collection schema and edit schema
packages/compass-data-modeling/src/components/saved-diagrams-list.spec.tsx	Removed isExpanded from test storage items
packages/compass-data-modeling/src/components/diagram-editor.tsx	Removed expand/collapse event handlers and related functionality
packages/compass-data-modeling/src/components/diagram-editor.spec.tsx	Removed isExpanded from test storage items
packages/compass-data-modeling/src/components/diagram-card.spec.tsx	Removed isExpanded from test data model
packages/compass-components/src/index.ts	Removed FieldId type export

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[codeowners-service-app]

Assigned himanshusinghs for team compass-developers because nbbeeken is out of office.