Add aoc crate that reads file from input argument; use it in the day01 crate

2022/day01/Cargo.toml

@@ -6,3 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+aoc = { path = "../aoc" }