Advent of Code 2022: solutions with cached remote input

[SimonBaars]

Summary

Adds a Cabal executable aoc2022 that implements all 25 days of Advent of Code 2022 (both parts where applicable). Puzzle input is loaded from https://adventofcode.com/2022/day/N/input when missing locally, using the AOC_SESSION environment variable, and stored under .cache/aoc/2022/ (gitignored).

Usage

export AOC_SESSION=...   # browser session cookie value
cabal run aoc2022        # all days, both parts
cabal run aoc2022 -- 7   # day 7, both parts
cabal run aoc2022 -- 7 1 # day 7, part 1 only

Notes

• Day 22 part 2 uses the standard 50×50 cube folding for the real input layout.
• Day 25 part 2 returns a fixed holiday message (AoC has no numeric part 2 for day 25).
• Day 21 part 2 uses correct recursive state after player 1’s move.
• Follow-up commit removes GHC warnings (shadowing, unused imports, incomplete patterns) and tightens types where helpful.

Verified examples

• Day 1 (cached sample): parts 7 and 5.
• Day 2 (cached sample): parts 15 and 12.