feat: implement benchmarks (#30)

.gitignore

@@ -16,5 +16,7 @@ target/
 
 # Advent of Code
 # @see https://old.reddit.com/r/adventofcode/comments/k99rod/sharing_input_data_were_we_requested_not_to/gf2ukkf/?context=3
-/src/inputs
-!/src/inputs/.keep
+/data
+!/data/inputs/.keep
+!/data/examples/.keep
+!/data/puzzles/.keep