chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

modules/markup/sanitizer_custom.go

@@ -0,0 +1,31 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package markup
+
+import (
+	"regexp"
+	"strings"
+
+	"gitea.dev/modules/setting"
+
+	"github.com/microcosm-cc/bluemonday"
+)
+
+func (st *Sanitizer) addSanitizerRules(policy *bluemonday.Policy, rules []setting.MarkupSanitizerRule) {
+	for _, rule := range rules {
+		if rule.AllowDataURIImages {
+			policy.AllowDataURIImages()
+		}
+		if rule.Element != "" {
+			if rule.Regexp != "" {
+				if !strings.HasPrefix(rule.Regexp, "^") || !strings.HasSuffix(rule.Regexp, "$") {
+					panic("Markup sanitizer rule regexp must start with ^ and end with $ to be strict")
+				}
+				policy.AllowAttrs(rule.AllowAttr).Matching(regexp.MustCompile(rule.Regexp)).OnElements(rule.Element)
+			} else {
+				policy.AllowAttrs(rule.AllowAttr).OnElements(rule.Element)
+			}
+		}
+	}
+}