Create FAQ's

[dvigneshwer]

Following points need to be covered:

• Options and Results
• ? operator
• Error handling
• File handling
• Path and PathBuf types
• Parsing String and &str
• Bit manipulation and 16-bit RGB565 representation
• vec vs arrays, and the clone trait. Objects allocated on the heap vs stack.

Please feel free to add your answers below, I will start to curate them sometime next week and will publish it during the Rust Hyd event.