Rework fixers to decide what to use and move dehtmlify process in them.

Added githubv fixer.

fixers/opennet_ru.go

@@ -1,11 +1,26 @@
 package fixers
 
-import "strings"
+import (
+	"log/slog"
+	"strings"
+
+	"github.com/mmcdole/gofeed"
+	"github.com/prodigeris/html2text"
+)
+
+func opennetFixer(item *gofeed.Item) (string, string) {
+	oldBody, err := html2text.FromString(item.Description, html2text.Options{
+		PrettyTables: true,
+	})
+	if err != nil {
+		slog.Error("Failed to de-HTMLify opennet body!", "error", err.Error())
+
+		return item.Title, item.Description
+	}
 
-func opennetFixer(title, body string) (string, string) {
 	newBody := &strings.Builder{}
 
-	for line := range strings.Lines(body) {
+	for line := range strings.Lines(oldBody) {
 		if strings.HasPrefix(line, "Источник") {
 			continue
 		}
@@ -13,5 +28,5 @@ func opennetFixer(title, body string) (string, string) {
 		_, _ = newBody.WriteString(line)
 	}
 
-	return title, newBody.String()
+	return item.Title, newBody.String()
 }