refactor: drop two unmaintained dependencies, rename the byte size helpers (#39083)

modules/util/bytesize.go

@@ -0,0 +1,16 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package util
+
+import "github.com/dustin/go-humanize"
+
+// FormatByteSize formats a byte count as a user-friendly string, e.g. "1.5 MiB".
+func FormatByteSize(size int64) string {
+	return humanize.IBytes(uint64(size))
+}
+
+// ParseByteSize parses a byte size such as "100MB" or "1.5 GiB".
+func ParseByteSize(value string) (uint64, error) {
+	return humanize.ParseBytes(value)
+}