Fix HTML escaping in API docs

[tim-smart]

Summary

• add context-specific attribute escaping to generated Scalar documentation
• escape script-data delimiters in embedded JSON
• cover Scalar and Swagger rendering regressions and add a patch changeset

Testing

• pnpm lint-fix
• pnpm test run packages/platform/test
• pnpm check
• pnpm build
• pnpm docgen

Closes EFF-204

[changeset-bot]

🦋 Changeset detected

Latest commit: 594dcff

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

This PR includes changesets to release 1 package

Name	Type
@effect/platform	Patch

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