feat: Intro primitives

[anonfedora]

Feature: Basic Arithmetic Operations Module

This PR introduces a new module that implements fundamental arithmetic operations using unsigned 8-bit integers (u8).

Changes:

• Added intro_to_u function demonstrating all arithmetic operations
• Implemented basic arithmetic functions:
  • sum: Addition of two u8 numbers
  • subtract: Subtraction of two u8 numbers
  • divide: Division of two u8 numbers
  • multiply: Multiplication of two u8 numbers
  • modulo: Modulo operation of two u8 numbers

Each function takes two u8 parameters and returns a u8 result. The main function provides example usage of all operations.

Note: This implementation uses u8 type which has a range of 0-255. Care should be taken to prevent overflow in production use.

Testing:
Basic operations tested with sample values:

• 5 + 10 = 15
• 15 - 10 = 5
• 15 / 10 = 1
• 15 * 10 = 150
• 15 % 10 = 5