Refactor markup render system (#32589)

This PR mainly moves some code and introduces `RenderContext.WithXxx`
functions

modules/csv/csv_test.go

@@ -5,13 +5,13 @@ package csv
 
 import (
 	"bytes"
+	"context"
 	"encoding/csv"
 	"io"
 	"strconv"
 	"strings"
 	"testing"
 
-	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/translation"
 
@@ -231,10 +231,7 @@ John Doe	john@doe.com	This,note,had,a,lot,of,commas,to,test,delimiters`,
 	}
 
 	for n, c := range cases {
-		delimiter := determineDelimiter(&markup.RenderContext{
-			Ctx:          git.DefaultContext,
-			RelativePath: c.filename,
-		}, []byte(decodeSlashes(t, c.csv)))
+		delimiter := determineDelimiter(markup.NewRenderContext(context.Background()).WithRelativePath(c.filename), []byte(decodeSlashes(t, c.csv)))
 		assert.EqualValues(t, c.expectedDelimiter, delimiter, "case %d: delimiter should be equal, expected '%c' got '%c'", n, c.expectedDelimiter, delimiter)
 	}
 }