big refactoring. get rid of static properties and coupled architecture. prepare system for integration tests

Azaion.Common/Services/PhysicalFileSystem.cs

@@ -0,0 +1,56 @@
+using System.IO;
+
+namespace Azaion.Common.Services;
+
+public class PhysicalFileSystem : IFileSystem
+{
+    public Task<byte[]> ReadAllBytesAsync(string path, CancellationToken ct = default)
+    {
+        return File.ReadAllBytesAsync(path, ct);
+    }
+
+    public Task WriteAllBytesAsync(string path, byte[] content, CancellationToken ct = default)
+    {
+        return File.WriteAllBytesAsync(path, content, ct);
+    }
+
+    public bool FileExists(string path)
+    {
+        return File.Exists(path);
+    }
+
+    public void DeleteFile(string path)
+    {
+        File.Delete(path);
+    }
+
+    public IEnumerable<string> GetFiles(string directory, string searchPattern)
+    {
+        return Directory.GetFiles(directory, searchPattern);
+    }
+
+    public IEnumerable<FileInfo> GetFileInfos(string directory, string[] searchPatterns)
+    {
+        var dir = new DirectoryInfo(directory);
+        if (!dir.Exists)
+            return Enumerable.Empty<FileInfo>();
+        
+        return searchPatterns.SelectMany(pattern => dir.GetFiles(pattern));
+    }
+
+    public DirectoryInfo GetDirectoryInfo(string path)
+    {
+        return new DirectoryInfo(path);
+    }
+
+    public bool DirectoryExists(string path)
+    {
+        return Directory.Exists(path);
+    }
+
+    public void CreateDirectory(string path)
+    {
+        Directory.CreateDirectory(path);
+    }
+}
+