Migrate codebase to TypeScript 7

[innoiso]

Summary

• migrate repository scripts, TypeDoc configuration, Svelte configuration, and PDF packaging tooling to TypeScript 7
• add a native TypeScript compiler lane across SDK examples
• preserve compatibility with the current TypeScript compiler API while validating the native preview compiler

Testing

• npm run typecheck:native
• pinned Linux verification: 76 passed and 8 intentional skips
• migration verification included SDK and example builds, unit tests, documentation checks, and end-to-end coverage

Risks

• TypeScript 7 native compiler behavior is preview-stage and may change
• repository tooling now depends on direct TypeScript execution through the configured loaders
• visual test snapshots were intentionally excluded because the local run only produced environment-specific image noise