chore(deps): update dependency @types/marked to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@​types/marked	4.3.2 → 6.0.0

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[doistbot]

This PR bumps @types/marked from v4.3.2 to v6.0.0 via Renovate.

Few things worth tightening:

• @types/marked v6 is a deprecated stub that expects marked to ship its own type definitions, but the project pins marked at v4.3.0, which doesn't include built-in types (those were added in v5). This will break TypeScript type resolution for the marked import in src/prose/prose-example.ts and fail npm run type-check. Either upgrade marked to v5+ alongside this change, or hold @types/marked at v4.x until marked is bumped.

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[doistbot]

@types/marked v6.0.0 is a stub that re-exports types from the marked package itself (it even carries a deprecation notice: "marked provides its own type definitions, so you do not need this installed"). But the project pins marked at v4.3.0, which does not ship its own types — its package.json has no types field. The result: TypeScript will fail to resolve the marked module's types, and npm run type-check (and npm run validate) will break on src/prose/prose-example.ts (import { marked } from 'marked'). Either bump marked to v5+ (which added built-in types) along with this change, or keep @types/marked at v4.x.