mopac-pdf v0: markdown to beautiful PDFs via digest-pinned typst

Go CLI that turns the markdown currency of this stack (Redmine notes,
Discourse posts, briefing output) into typeset PDFs: two embedded typst
templates (report with title page/TOC/headers, dense brief), front-matter
(title/subtitle/author/date/classification/template), GFM tables, and
bar charts rendered in pure Go (go-chart) from fenced chart data blocks.
Engine is a prebuilt typst 0.15.1 container pinned by digest and run
--network none; PDF bytes to stdout or -o. Exit codes 0/1/2.

All dev in docker (dev.sh/Makefile); unit tests + golden typst fixtures
plus a host-side smoke against the real engine container.

Generated with Crush

Assisted-by: Crush:glm-5.2

vendor/github.com/wcharczuk/go-chart/v2/range.go

@@ -0,0 +1,43 @@
+package chart
+
+// NameProvider is a type that returns a name.
+type NameProvider interface {
+	GetName() string
+}
+
+// StyleProvider is a type that returns a style.
+type StyleProvider interface {
+	GetStyle() Style
+}
+
+// IsZeroable is a type that returns if it's been set or not.
+type IsZeroable interface {
+	IsZero() bool
+}
+
+// Stringable is a type that has a string representation.
+type Stringable interface {
+	String() string
+}
+
+// Range is a common interface for a range of values.
+type Range interface {
+	Stringable
+	IsZeroable
+
+	GetMin() float64
+	SetMin(min float64)
+
+	GetMax() float64
+	SetMax(max float64)
+
+	GetDelta() float64
+
+	GetDomain() int
+	SetDomain(domain int)
+
+	IsDescending() bool
+
+	// Translate the range to the domain.
+	Translate(value float64) int
+}