refactor(esl-image): officially deprecate ESLImage

[ala-n]

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[Copilot]

Pull request overview

This PR deprecates the legacy ESLImage custom element and removes it from the primary ESL “all” entrypoints, while keeping it available for the website demo app via explicit legacy imports.

Changes:

• Mark ESLImage as deprecated in its JSDoc.
• Remove esl-image exports/styles from packages/esl/src/all.ts and packages/esl/src/all.less.
• Re-add legacy ESLImage exports/styles explicitly in packages/esl-website for demos.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/esl/src/esl-image/core/esl-image.ts	Adds a deprecation notice to the ESLImage public API docs.
packages/esl/src/all.ts	Stops re-exporting legacy esl-image from the main barrel entrypoint.
packages/esl/src/all.less	Stops including legacy esl-image styles in the aggregated LESS bundle.
packages/esl-website/src/lib.ts	Re-exports ESLImage via a deep import for website demos.
packages/esl-website/src/lib.less	Re-imports legacy esl-image LESS for website demos.

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[qltysh]

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