fix(*): remove generated test declaration files from types follow-up

[Rishabh060105]

Follow-up to #649

This PR follows up on #649 by removing stale generated *.test.d.ts artifacts that are still present in the published types/ tree.

Changes

• Removed generated test declaration files from packages/markdown-common/types/lib
• Removed generated test declaration files from packages/markdown-cicero/types/lib
• Removed generated test declaration files from packages/markdown-html/types/lib

Flags

• This PR is intended as a focused follow-up to feat: add typescript type declarations for all packages #649 by @salama968, not a competing implementation of Add Typescript types #648
• The change is intentionally narrow: it only removes stale generated test typings that would otherwise be published from the types/ folder

Screenshots or Video

• Not applicable

Related Issues

• Issue Add Typescript types #648
• Pull Request feat: add typescript type declarations for all packages #649

Author Checklist

• Ensure you provide a DCO sign-off for your commits using the --signoff option of git commit.
• Vital features and changes captured in unit and/or integration tests
• Commits messages follow AP format
• Extend the documentation, if necessary
• Merging to main from Rishabh060105/pr649-followup-remove-test-dts

[Rishabh060105]

Hi @mttrbrts, I opened a small follow-up for #649 to address the remaining generated test typings that were still present in the published types/ output.

This follow-up only removes the stale declaration artifacts, specifically the *.test.d.ts files under:

• packages/markdown-common/types/lib
• packages/markdown-cicero/types/lib
• packages/markdown-html/types/lib

I kept it intentionally narrow so it doesn’t change @salama968 broader TypeScript declaration approach, and only cleans up files that would otherwise be shipped from the types/ folder.

[mttrbrts]

@salama968 @Rishabh060105 Thank you both. This PR contains both of your commits and you'll both be marked as contributors. Great collaboration!

[mttrbrts]

Thanks for the clean-up @Rishabh060105. The stale test declaration files are now removed and this has been merged.

As a follow-up, I've opened #668 to track improving the type quality — replacing the any return types with actual Concerto DOM types on the key public transformer APIs.