style(cli): fix Biome formatting in SelectPrompt

feat(cli): show last played time in profile list

feat(cli): add description support to SelectPrompt

feat(cli): update lastPlayedAt on level play

feat(cli): set lastPlayedAt on creation and sort profiles by recency

feat(cli): add lastPlayedAt field to Profile

feat(cli): add relative time formatter utility

fix(abilities): add isWarrior to Unit interface and fix direction types

feat: add warrior flag to UnitRef for correct log coloring

fix(cli): resolve duplicated stats in log messages

refactor(core): replace Unit constructor params with declarative field declarations

chore: remove docs/superpowers directory

refactor(cli): consolidate test utilities into src/testing/

refactor(cli): replace mock-fs and array-shuffle with modern alternatives

feat(cli): add JSDoc comments to generated type definitions