feat: cleaner default output format (#1)

feat: migrate from OAuth API to Claude Code statusline JSON stdin

fix: discard stale cached data when resets_at is in the past

fix: enforce minimum 60s backoff when retry-after is 0

docs: update troubleshooting section for new error messages

feat: indicate stale data with ~ prefix on cached values

feat: user-friendly errors and retry-after caching for rate limits

docs: expand ccstatusline integration steps with UI navigation detail

docs: update installation and usage paths to ~/.local/bin

docs: update preview to show new pipe-bounded partial block bar style

fix(bar): use partial block chars and pipe-bounded style for finer granularity

docs: made it clearer this is for Claude Code

add ccstatusline repository links to README

Simplified README

Remove caching entirely for real-time updates