Use new AoC infrastructure and clean up.

lib.py

@@ -1,18 +0,0 @@
-import re
-
-def str_to_single_int(line: str) -> int:
-    line = line.replace(" ", "")
-    r = re.compile(r"-?\d+")
-    for m in r.findall(line):
-        return int(m)
-    raise Exception("No single digit sequence in '{line}'")
-
-def str_to_int_list(line: str) -> list[int]:
-    r = re.compile(r"-?\d+")
-    return list(map(int, r.findall(line)))
-
-def str_to_lines_no_empty(text: str) -> list[str]:
-    return list(filter(lambda l: l.strip() != "", text.splitlines()))
-
-def str_to_lines(text: str) -> list[str]:
-    return list(text.splitlines())

lib.py

@@ -0,0 +1 @@
+../aoc2023/lib.py