Add RotatingCalipers algorithm and tests

[SuhaniChavan-26]

This PR implements the Rotating Calipers algorithm under the geometry package, as requested in issue #6672.

Changes include:

• RotatingCalipers.java: Main implementation of the algorithm, including methods for diameter, width, and minimum-area bounding rectangle of a convex polygon.
• RotatingCalipersTest.java: Unit tests using JUnit 5 covering simple and edge cases.

Both files are placed under the correct package com.thealgorithms.geometry and follow the repository's coding conventions.

This addresses issue #6672.

[DenizAltunkapan]

@SuhaniChavan-26 Please fix the failing workflows so I can start the review.