Change MaximumFlowSynxVersion to the TargetFlowSynxVersion and it related description and fix unit tests

#21

Author: ziagham

src/PluginMetadata.cs

@@ -115,12 +115,17 @@ public required string CompanyName
     /// <summary>
     /// The minimum version of the FlowSynx engine this plugin is compatible with.
     /// </summary>
-    public Version? MinimumFlowSynxVersion { get; set; }
+    public required Version MinimumFlowSynxVersion { get; set; }
 
     /// <summary>
-    /// The maximum version of the FlowSynx engine this plugin is compatible with.
+    /// Gets or sets the FlowSynx version that this plugin was developed and tested against.
     /// </summary>
-    public Version? MaximumFlowSynxVersion { get; set; }
+    /// <remarks>
+    /// This property indicates the version of the FlowSynx host system that the plugin is known to be compatible with.
+    /// It is used for forward compatibility checks, allowing the host to warn if the plugin has not been tested
+    /// against newer host versions.
+    /// </remarks>
+    public Version? TargetFlowSynxVersion { get; set; }
 
     /// <summary>
     /// Validates that an identifier is non-empty, starts with a letter,

tests/PluginMetadataTests.cs

@@ -13,6 +13,7 @@ public void TypeProperty_ReturnsCorrectFormat()
             Version = new PluginVersion(1, 0, 0),
             Category = PluginCategory.Api,
             CompanyName = "Test",
+            MinimumFlowSynxVersion = new Version(1, 0, 0)
         };
 
         // Act
@@ -39,7 +40,8 @@ public void Properties_AreAssignedCorrectly()
             Authors = new List<string> { "DevTeam" },
             ProjectUrl = "https://registry.flowsynx.io/AnalyticsPlugin/",
             Category = category,
-            CompanyName= "Test"
+            CompanyName= "Test",
+            MinimumFlowSynxVersion = new Version(1, 0, 0)
         };
 
         // Assert
@@ -64,6 +66,7 @@ public void TypeProperty_HandlesDifferentNamespacesAndNames()
             Version = new PluginVersion(0, 1, 1),
             Category = PluginCategory.AI,
             CompanyName = "Test",
+            MinimumFlowSynxVersion = new Version(1, 0, 0)
         };
 
         // Act

tests/PluginTests.cs

@@ -101,7 +101,8 @@ public FakePlugin()
             Version =  new PluginVersion(1, 0, 0),
             Category = PluginCategory.Api,
             Authors = new List<string> { "Test" },
-            CompanyName = "Test"
+            CompanyName = "Test",
+            MinimumFlowSynxVersion = new Version(1, 0, 0)
         };
     }