feat: initial release v0.3.0

- Support 9 chart types: line, bar, pie, scatter, bubble, donut, mixed, polar, radar
- Multi-format output: ANSI, SVG, PNG, Markdown
- Go + Fiber + gonum/plot
- Docker support
- Morandi color palette

internal/renderer/utils.go

@@ -0,0 +1,9 @@
+package renderer
+
+func getColor(index int) string {
+	colors := []string{
+		"#f9c2c8", "#f3d2b1", "#e1e9c5", "#b2d5e8",
+		"#8fa3c4", "#75B4A0", "#3b7f8d", "#a18b7c",
+	}
+	return colors[index%len(colors)]
+}