Add plan for long breaks and session counter changes

feat: per-activity counts, configurable notifications, statusline blink

docs: bump version to v1.1 in README

docs: add behaviour section documenting skip and persistence rules

docs: update README for v1.1 (long breaks, session counter, new statusline format)

fix: avoid mutating caller opts table in setup()

feat: load daily count from disk on setup()

fix: wrap writefile in pcall in _save_daily_count to handle disk errors gracefully

feat: add daily count persistence with load/save

test: add statusline tests for break-phase dots and configurable interval

feat: update statusline with dots, daily count, and long_break icon

docs: clarify skip() does not count skipped sessions in pomodoro counters

feat: update skip() to decide break vs long_break

test: tighten short-break boundary test (set_count=2 is adjacent to long_break threshold)

feat: add set_count/daily_count increments and long break logic to _tick