Description

This Pull Request adds a new term entry for C++ Arrays begin().
The new file is located at content/cpp/concepts/arrays/terms/begin/begin.md.

This entry explains how to use begin() to obtain an iterator pointing to the first element in C++ std::array containers, as well as how to use std::begin() for C-style arrays. The entry includes:

• A definition of the term.
• Syntax details for both std::array::begin() and std::begin().
• An illustrative example showing usage with both std::array and C-style arrays.
• A runnable Codebyte example focusing on std::array::begin().

This contribution aims to provide clear and comprehensive documentation for this fundamental C++ array operation.

Issue Solved

Closes #6787

Type of Change

• Adding a new entry
• Editing an existing entry (fixing a typo, bug, issues, etc)
• Updating the documentation

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. - [x] 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 (cpp-arrays-begin-entry).
• I have linked any issues that are relevant to this PR in the Issues Solved section.