fix(funbox): proper rtl and ligature handling in polyglot with mixed languages (@byseif21)

[byseif21]

Description

This PR addresses an issue in Monkeytype's funbox "polyglot" mode where mixing right-to-left (RTL) and left-to-right (LTR) languages—while the main language is set to LTR—would break ligature rendering for RTL languages.

Key Changes

• Introduces PolyglotResult type: The withWords method in funbox functions may now return a PolyglotResult object containing the generated wordset and metadata about directionality (allRightToLeft) and ligature support (allLigatures).

• Updates polyglot logic: When polyglot mode is active, the system checks all included languages for RTL and ligature support and returns this info in the result.

Notes

• Maintains backward compatibility for non-polyglot funboxes.
• Adds runtime type checks for the new result type.
• No breaking changes expected for existing test modes.

[sentry[bot]]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: frontend/src/ts/test/test-logic.ts

Function	Unhandled Issue
init	Error: activeWord is undefined - can't update active element ... Event Count: 2 Affected Users: 2

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[byseif21]

handled in #6666