Pull request overview

This PR improves the documentation for integers and floating-point numbers in the Swift language guide's "The Basics" section. The changes provide more comprehensive explanations of integer and floating-point number behavior, precision characteristics, and use cases. Key changes:

• Enhanced integer documentation with details about bit sizes, naming conventions, fixed-point arithmetic, and overflow behavior
• Expanded floating-point number section with precision ...

Grammatical error: 'have include' should be 'have' or 'include'. Remove the duplicate word 'have'. Floating-point numbers have values for negative zero, infinity, and negative infinity, which represent overflow and underflow in calculations. They also include not-a-number (NaN) values to represent an invalid or undefined result, such as dividing zero by zero. This behavior is different from integers, which stop the program if they can't represent the result.