feat(math): implement m:limUpp upper-limit converter

[Abdeltoto]

Closes #2600

Summary

• Implements the \m:limUpp\ OMML-to-MathML converter (upper limit)
• Maps \m:limUpp\ to MathML <mover>\ with base and limit as <mrow>\ children
• Registers the converter in \MATH_OBJECT_REGISTRY\
• Adds 2 unit tests covering standard usage and missing limit

Spec reference

ECMA-376 Section 22.1.2.56

Test plan

• \�itest run\ passes for omml-to-mathml.test.ts
• Linter and formatter pass (lefthook pre-commit)

Made with Cursor

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 3b494a3e8c

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

Remove accidentally committed review transcript file

Untitled contains a pasted GitHub PR/review transcript unrelated to this m:limUpp change (it references a different m:rad PR), so it appears to be an accidental artifact rather than source or test data. Keeping this file at repo root adds irrelevant content to the codebase and release source archives, and makes future maintenance/searches noisier; it should be removed from the commit.

Useful? React with 👍 / 👎.