Normalize guessed languages for code highlighting (#36450)

For when Enry correctly recognized the language, but returns the
language name in a way that isn't recognized by chroma.

Resolves https://github.com/go-gitea/gitea/issues/22443

---------

Co-authored-by: Moritz Jörg <moritz.jorg@oceanbox.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/web/repo/blame.go

@@ -267,7 +267,7 @@ func renderBlame(ctx *context.Context, blameParts []*gitrepo.BlamePart, commitNa
 
 	bufContent := buf.Bytes()
 	bufContent = charset.ToUTF8(bufContent, charset.ConvertOpts{})
-	highlighted, lexerName := highlight.Code(path.Base(ctx.Repo.TreePath), language, util.UnsafeBytesToString(bufContent))
+	highlighted, lexerName := highlight.RenderCodeSlowGuess(path.Base(ctx.Repo.TreePath), language, util.UnsafeBytesToString(bufContent))
 	unsafeLines := highlight.UnsafeSplitHighlightedLines(highlighted)
 	for i, br := range rows {
 		var line template.HTML

routers/web/repo/view_file.go

@@ -124,11 +124,11 @@ func handleFileViewRenderSource(ctx *context.Context, filename string, attrs *at
 	}
 
 	language := attrs.GetLanguage().Value()
-	fileContent, lexerName, err := highlight.File(filename, language, buf)
+	fileContent, lexerName, err := highlight.RenderFullFile(filename, language, buf)
 	ctx.Data["LexerName"] = lexerName
 	if err != nil {
-		log.Error("highlight.File failed, fallback to plain text: %v", err)
-		fileContent = highlight.PlainText(buf)
+		log.Error("highlight.RenderFullFile failed, fallback to plain text: %v", err)
+		fileContent = highlight.RenderPlainText(buf)
 	}
 	status := &charset.EscapeStatus{}
 	statuses := make([]*charset.EscapeStatus, len(fileContent))