docs: proofread README and correct usage flags

[DivInstance]

This PR improves the documentation for THorse to enhance clarity, accuracy, and usability.

Summary of changes:

• Corrected terminology (Metasploit, Meterpreter) and fixed common typos (Obfuscate, Roaming, sent, automatically)
• Fixed Windows usage examples to use the correct -w flag instead of -l
• Replaced fragile line-number instruction for PYTHON_PYINSTALLER_PATH with a stable variable reference and example
• Improved grammar and formatting across features, screenshots, and update sections
• Corrected Linux removal destination path to ~/.config/xinput
• Normalized step numbering and minor formatting issues

Why:

• Ensures users can follow instructions without errors
• Improves GitHub rendering and professionalism
• Reduces confusion when configuring and running scripts

Testing:

• Manually reviewed all README sections for rendering and correctness
• Grepped for remaining obvious typos and incorrect flags

This is a documentation-only change; no code behavior is affected.

Closes #21