Initial commit:

Added framework to generate DOT and png files of character map chart
from data folder.
Added all figures in the 1-2 chapters.
Added font file SimSum for render chart

go.mod

@@ -0,0 +1,25 @@
+module xyj-figures
+
+go 1.22.2
+
+require (
+	github.com/flopp/go-findfont v0.1.0
+	github.com/go-test/deep v1.1.1
+	github.com/goccy/go-graphviz v0.1.3
+	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
+	github.com/sirupsen/logrus v1.9.3
+	github.com/spf13/cobra v1.8.1
+	github.com/stretchr/testify v1.7.0
+	golang.org/x/image v0.14.0
+	gopkg.in/yaml.v3 v3.0.1
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/fogleman/gg v1.3.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	golang.org/x/sys v0.6.0 // indirect
+)