Add support for bfchroma syntax highlighting

Signed-off-by: Izuru Yakumo <yakumo.izuru@chaotic.ninja>

git-svn-id: file:///srv/svn/repo/aya/trunk@66 cec141ff-132a-4243-88a5-ce187bd62f94

go.mod

@@ -3,6 +3,7 @@ module marisa.chaotic.ninja/aya
 go 1.17
 
 require (
+	github.com/Depado/bfchroma/v2 v2.0.0
 	github.com/eknkc/amber v0.0.0-20171010120322-cdade1c07385
 	github.com/russross/blackfriday/v2 v2.1.0
 	github.com/sirupsen/logrus v1.9.0
@@ -10,4 +11,8 @@ require (
 	gopkg.in/yaml.v2 v2.4.0
 )
 
-require golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 // indirect
+require (
+	github.com/alecthomas/chroma/v2 v2.2.0 // indirect
+	github.com/dlclark/regexp2 v1.4.0 // indirect
+	golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 // indirect
+)