feat: add fnOS packaging, storage workflows and release pipeline

storage/StoragePath.cs

@@ -0,0 +1,35 @@
+namespace dy.net.storage
+{
+    public static class StoragePath
+    {
+        public static string NormalizeRemote(string path)
+        {
+            if (string.IsNullOrWhiteSpace(path)) return "/";
+
+            var normalized = path.Replace('\\', '/').Trim();
+            var segments = normalized.Split('/', StringSplitOptions.RemoveEmptyEntries);
+            if (segments.Any(x => x == "." || x == ".."))
+                throw new ArgumentException("远端存储路径不能包含 . 或 ..", nameof(path));
+
+            return "/" + string.Join('/', segments);
+        }
+
+        public static string CombineRemote(params string[] parts)
+        {
+            return NormalizeRemote(string.Join('/', parts.Where(x => !string.IsNullOrWhiteSpace(x))));
+        }
+
+        public static string DirectoryName(string path)
+        {
+            var normalized = NormalizeRemote(path);
+            var lastSlash = normalized.LastIndexOf('/');
+            return lastSlash <= 0 ? "/" : normalized[..lastSlash];
+        }
+
+        public static string Encode(string path)
+        {
+            var normalized = NormalizeRemote(path);
+            return string.Join('/', normalized.Split('/').Select(Uri.EscapeDataString));
+        }
+    }
+}