raggity v0.8.0

First-run onboarding + batteries-included document readers. rag init scaffolds an annotated raggity.toml. Empty-KB guidance: ask/chat/status now tell you to run rag init → rag ingest instead of silently abstaining, and warn when no config is found. Skipped-file hints: ingest reports files that need an optional extra (e.g. "Skipped 3 file(s) needing raggity[ocr]") instead of dropping them silently — surfaced in the CLI and the server /ingest response. Batteries-included install: pip install raggity now reads md/txt/pdf plus docx/html/pptx out of the box (the lightweight readers moved into base deps); only image/scanned-PDF OCR stays opt-in via raggity[ocr]. New raggity[all] installs every optional feature. Also fixed Rich-markup swallowing [extra] in install hints and non-ASCII dashes mangling on the Windows console. 324 tests, 0 warnings.