TVOnline v0.1.0

Baseline showcase release for TVOnline.\n\nIncluded in this release:\n- polished repository README, quickstart docs, and CI baseline\n- explicit no-license notice for reuse clarity\n- standardized default branch moved to main\n- initial changelog and release-discipline documentation\n\nNotes:\n- no demo screenshots or deployment URL are published yet\n- stream availability still depends on public upstream IPTV sources