Enhance README with Formal Tone and Emojis for Improved Clarity

[ThomasHumper]

This pull request updates the README file to adopt a more formal tone and incorporates emojis to enhance readability and organization. The changes include:

Added formal language throughout the instructions for compiling ClassiCube on various platforms.
Incorporated emojis to visually distinguish different sections and make the document easier to navigate.
Clarified and standardized the instructions for different environments, including Windows, Linux, macOS, Android, iOS, and other platforms.
Updated cross-compilation and console-specific instructions to improve clarity and user guidance.

These updates aim to provide a clearer, more professional presentation of the compilation instructions, making it easier for users to follow the setup process across different systems.