feat: Add text editor

Use Monaco Editor to create notes. Support syntax highlighting. Store the
language with the note in the database to later support syntax highlighting in
a note web view.

Signed-off-by: Julien Riou <julien@riou.xyz>

src/internal/utils.go

@@ -8,6 +8,7 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
+	"strings"
 )
 
 func ReadConfig(file string, config interface{}) error {
@@ -109,3 +110,10 @@ func ReturnError(logger *slog.Logger, message string, err error) int {
 	}
 	return RC_ERROR
 }
+
+func ToLowerStringSlice(src []string) (dst []string) {
+	for _, s := range src {
+		dst = append(dst, strings.ToLower(s))
+	}
+	return
+}