Sync from wiki/ in tiko-lang 68ef0e8dc: AI Cheatsheet, std/tz and std/tzdata, chrono local-offset pages tiko-lang wiki commits since the last sync (e1cecc47a): 68ef0e8dc wiki: José Roca's GitHub edits (15 commits, a7888f9..9d0264e), copied back 6cfbae26e wiki: AI Cheatsheet -- tiko on one page for AI coding agents c739f0607 std/tzdata: tzdata 2026f c80742526 docs: std/tz and std/tzdata -- wiki, tiko by Example, book chapter 26 (Z7) c72e17958 std/chrono Z0: TryLocalOffsetAt; Unix zone names from tm_zone c76d6e6c8 std/chrono: resolve local wall readings properly; AssumeLocal