build: migrate geometry objects to Kotlin

[kikoso]

This PR migrates the Point and Bounds classes from Java to Kotlin. These classes are fundamental geometry objects used throughout the library.

Changes:

• Converted Point.java to Point.kt.
• Converted Bounds.java to Bounds.kt.
• Ensured binary compatibility with existing Java code by using @JvmField annotations and making the Point class open to allow for extension.

Motivation:

This migration is part of an ongoing effort to modernize the codebase and adopt Kotlin

[googlemaps-bot]

Code Coverage

Overall Project	36.32%	🍏
Files changed	100%	🍏

File	Coverage
Point.kt	100%	🍏
Bounds.kt	100%	🍏