Roadmap: snipshot power-CLI

Umbrella tracker for snipshot's roadmap.

**Direction:** a focused, best-in-class *terminal* tool (no web/service/extension surface). Weighted toward **output aesthetics**, **input & integrations**, and **robustness/performance**.

Vendoring Monaco locally (#6) removes the CDN dependency **while keeping Monaco's built-ins** — its diff editor (#12) and decorations (#11) — rather than reinventing them.

### v0.2 — Rendering foundation
- [ ] #6 Vendor Monaco locally — offline, no CDN (keystone)
- [ ] #13 Line-number controls (toggle + start)
- [ ] #1 Multi-font & custom fonts

### v0.3 — Aesthetics I (the card)
- [ ] #2 Custom style (umbrella)
- [ ] #7 Backgrounds (solid/gradient/image/preset/auto)
- [ ] #8 Window shadow / glow
- [ ] #9 Border color & width
- [ ] #10 Window chrome variants + title
- [ ] #3 Custom export (formats)
- [ ] #14 Output scale / DPR

### v0.4 — Line-level power (Aesthetics II)
- [ ] #11 Line highlight / focus / word (Monaco decorations)
- [ ] #12 Diff mode (Monaco diff editor)
- [ ] #4 Meta info

### v0.5 — Input sources
- [ ] #17 stdin / pipe + `--lang`
- [ ] #18 Line-range selection
- [ ] #19 Clipboard in / out
- [ ] #22 Picker: hidden + depth

### v0.6 — Fetch & batch
- [ ] #20 GitHub / gist / URL input
- [ ] #21 Glob / multi-file batch
- [ ] #24 Browser reuse across renders
- [ ] #23 Watch mode

### v0.7 — Config & DX
- [ ] #5 Config file + presets
- [ ] #16 Social / aspect presets
- [ ] #15 Watermark / signature
- [ ] #25 System Chrome path
- [ ] #26 Diagnostics (`--verbose`/`--timeout`)

### v0.8 → v1.0 — Hardening & distribution
- [ ] #27 Test suite (unit + golden-image)
- [ ] #28 CI (GitHub Actions)
- [ ] #29 Publish to npm + npx + API docs