[akhila-pynam]

Description of Change

Converts Javadoc-style banner comments (/****************) to standard Doxygen comments (/** ... */) in search/binary_search.cpp and search/interpolation_search.cpp.

In doc/Doxyfile, JAVADOC_BANNER = NO is configured, which causes Doxygen to treat banner-style comments as plain C comments and ignore them. As a result, the @file blocks are ignored and the files are rendered bold and unclickable on the GitHub Pages documentation site. Converting them to standard Doxygen comment blocks resolves this issue.

Related to #3234

Checklist

• Added description of change
• Added tests and example, test must pass
• Added documentation so that the program is self-explanatory and educational - Doxygen guidelines
• Relevant documentation/comments is changed or added
• PR title follows semantic commit guidelines
• Search previous suggestions before making a new one, as yours may be a duplicate.
• I acknowledge that all my contributions will be made under the project's license.

Notes: Fixes Doxygen rendering for search/binary_search.cpp and search/interpolation_search.cpp by replacing Javadoc banner style comments with standard Doxygen comments.