Store ChromaHighlighter in lmcli.Context and use it

In preparation for TUI

pkg/cmd/util/util.go

@@ -2,7 +2,6 @@ package util
 
 import (
 	"fmt"
-	"io"
 	"os"
 	"strings"
 	"time"
@@ -11,7 +10,6 @@ import (
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli/model"
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli/tools"
 	"git.mlow.ca/mlow/lmcli/pkg/util"
-	"github.com/alecthomas/chroma/v2/quick"
 	"github.com/charmbracelet/lipgloss"
 )
 
@@ -240,12 +238,6 @@ func RenderConversation(ctx *lmcli.Context, messages []model.Message, spaceForRe
 	}
 }
 
-// HighlightMarkdown applies syntax highlighting to the provided markdown text
-// and writes it to stdout.
-func HighlightMarkdown(w io.Writer, markdownText string, formatter string, style string) error {
-	return quick.Highlight(w, markdownText, "md", formatter, style)
-}
-
 func RenderMessage(ctx *lmcli.Context, m *model.Message) {
 	var messageAge string
 	if m.CreatedAt.IsZero() {
@@ -274,11 +266,7 @@ func RenderMessage(ctx *lmcli.Context, m *model.Message) {
 
 	fmt.Printf("%s %s - %s %s\n\n", separator, role, timestamp, separator)
 	if m.Content != "" {
-		HighlightMarkdown(
-			os.Stdout, m.Content,
-			*ctx.Config.Chroma.Formatter,
-			*ctx.Config.Chroma.Style,
-		)
+		ctx.Chroma.Highlight(os.Stdout, m.Content)
 		fmt.Println()
 	}
 }