Add skeleton project

Signed-off-by: Anthony Oteri <anthony.oteri@gmail.com>

day-00/src/error.rs

@@ -0,0 +1,9 @@
+use miette::Diagnostic;
+use thiserror::Error;
+
+#[derive(Error, Diagnostic, Debug)]
+pub enum AocError {
+    #[error(transparent)]
+    #[diagnostic(code(aoc::io_error))]
+    IoError(#[from] std::io::Error),
+}