feat: add a single provider resolution implementation

Author: Tmakinde

src/implementation/multiprovider/ProviderResolutionResult.php

@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenFeature\implementation\multiprovider;
+
+use OpenFeature\interfaces\provider\Provider;
+use OpenFeature\interfaces\provider\ResolutionDetails;
+use Throwable;
+
+/**
+ * Represents the result of evaluating a single provider in a multi-provider setup.
+ * Contains the resolution details, any error that was thrown, and the source provider information.
+ */
+class ProviderResolutionResult
+{
+    public function __construct(
+        private string $providerName,
+        private Provider $provider,
+        private ?ResolutionDetails $details = null,
+        private ?Throwable $error = null,
+    ) {
+    }
+
+    public function getProviderName(): string
+    {
+        return $this->providerName;
+    }
+
+    public function getProvider(): Provider
+    {
+        return $this->provider;
+    }
+
+    public function getDetails(): ?ResolutionDetails
+    {
+        return $this->details;
+    }
+
+    public function getError(): ?Throwable
+    {
+        return $this->error;
+    }
+
+    public function hasError(): bool
+    {
+        return $this->error !== null;
+    }
+
+    public function isSuccessful(): bool
+    {
+        return $this->details !== null && $this->error === null;
+    }
+}