prc error type does not implement Error trait

[ScanMountGoat]

The current struct is hard to use with existing Rust syntax like ? or Box<dyn Error>>.

prc-rs/src/prc_trait.rs

Lines 42 to 47 in 29b8981

	#[derive(Debug)]
	pub struct Error {
	pub path: Vec<ErrorPathPart>,
	pub position: std::io::Result<u64>,
	pub kind: ErrorKind,
	}