day 4 pt 1 & 2

some parts stolen from the internet but i learned a lot

Cargo.toml

@@ -24,8 +24,10 @@ test_lib = []
 # Template dependencies
 chrono = { version = "0.4.38", optional = true }
 dhat = { version = "0.3.3", optional = true }
+itertools = "0.13.0"
 pico-args = "0.5.0"
 regex = "1.11.1"
+tap = "1.0.1"
 tinyjson = "2.5.1"
 
 # Solution dependencies