Add C# Math.IEEERemainder() term entry

[ylevental]

Description

Added term entry for Math.IEEERemainder() method under C# math-functions concept. The method computes IEEE 754 remainder, which differs from modulo (%) operator by using "round to nearest" for the quotient.

Entry includes:

• Metadata with appropriate tags and catalog content
• Syntax section with parameter and return value specifications
• Example comparing IEEE remainder vs modulo operator behavior
• Codebyte with runnable code demonstrating positive/negative operands and key behavioral differences

Issue Solved

Closes #7987

Type of Change

• Adding a new entry

Checklist

• All writings are my own.
• My entry follows the Codecademy Docs style guide.
• My changes generate no new warnings.
• I have performed a self-review of my own writing and code.
• I have checked my entry and corrected any misspellings.
• I have made corresponding changes to the documentation if needed.
• I have confirmed my changes are not being pushed from my forked main branch.
• I have confirmed that I'm pushing from a new branch named after the changes I'm making.
• I have linked any issues that are relevant to this PR in the Issues Solved section.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ ylevental
❌ Copilot
_{You have signed the CLA already but the status is still pending? Let us recheck it.}