Function validate 

pub fn validate(faf: &FafFile) -> ValidationResult

Validate FAF file structure

Example

use faf_rust_sdk::{parse, validate};

let content = r#"
faf_version: 2.5.0
project:
  name: test
"#;

let faf = parse(content).unwrap();
let result = validate(&faf);
assert!(result.valid);