Fix: PlateController forgets the active editor on blur

[12joan]

Fixes #4143

Due to the store setter methods not being stable, the code that was supposed to unset the active editor when that editor unmounts was being called when the editor is blurred.

This PR also adds Playwright tests for PlateController in tooling/e2e/plate-controller.spec.ts and creates a new page /e2e-examples/plate-controller where PlateController can be tested.

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Name	Status	Preview	Comments	Updated (UTC)
plate	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 17, 2025 4:51pm

[changeset-bot]

🦋 Changeset detected

Latest commit: ce307b1

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 58 packages

Name	Type
@udecode/plate-core	Major
@udecode/react-utils	Major
@udecode/plate-utils	Major
@udecode/plate	Major
@udecode/cn	Major
@udecode/plate-alignment	Major
@udecode/plate-autoformat	Major
@udecode/plate-basic-elements	Major
@udecode/plate-basic-marks	Major
@udecode/plate-block-quote	Major
@udecode/plate-break	Major
@udecode/plate-callout	Major
@udecode/plate-caption	Major
@udecode/plate-code-block	Major
@udecode/plate-combobox	Major
@udecode/plate-comments	Major
@udecode/plate-csv	Major
@udecode/plate-cursor	Major
@udecode/plate-date	Major
@udecode/plate-diff	Major
@udecode/plate-dnd	Major
@udecode/plate-docx	Major
@udecode/plate-emoji	Major
@udecode/plate-excalidraw	Major
@udecode/plate-find-replace	Major
@udecode/plate-floating	Major
@udecode/plate-font	Major
@udecode/plate-heading	Major
@udecode/plate-highlight	Major
@udecode/plate-horizontal-rule	Major
@udecode/plate-indent-list	Major
@udecode/plate-indent	Major
@udecode/plate-juice	Major
@udecode/plate-kbd	Major
@udecode/plate-layout	Major
@udecode/plate-line-height	Major
@udecode/plate-link	Major
@udecode/plate-list	Major
@udecode/plate-markdown	Major
@udecode/plate-math	Major
@udecode/plate-media	Major
@udecode/plate-mention	Major
@udecode/plate-node-id	Major
@udecode/plate-normalizers	Major
@udecode/plate-playwright	Major
@udecode/plate-reset-node	Major
@udecode/plate-resizable	Major
@udecode/plate-select	Major
@udecode/plate-selection	Major
@udecode/plate-slash-command	Major
@udecode/plate-suggestion	Major
@udecode/plate-tabbable	Major
@udecode/plate-table	Major
@udecode/plate-tag	Major
@udecode/plate-toggle	Major
@udecode/plate-trailing-block	Major
@udecode/plate-yjs	Major
@udecode/plate-ai	Major

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