Add Foundgine to .NET server tools

src/code/language-support/c-net/server/foundgine.md

@@ -0,0 +1,38 @@
+---
+name: Foundgine
+description: A semantic execution layer for .NET with a Hot Chocolate adapter that translates GraphQL queries into authorized, provider-independent execution plans.
+url: https://cristianbarragan.github.io/Foundgine/docs-site/index.html
+github: CristianBarragan/Foundgine
+tags:
+  - tools-and-libraries
+  - backend
+  - ai
+---
+
+Foundgine.GraphQL.HotChocolate is a Hot Chocolate adapter that translates incoming GraphQL query syntax into Foundgine's provider-neutral semantic requests:
+
+```text
+GraphQL → AST → Semantic Request → Foundgine runtime
+```
+
+The adapter parses the GraphQL document (fields, aliases, fragments, directives, variables), resolves the root field against Foundgine's semantic model, and hands off a structured request — GraphQL syntax never leaks past this boundary.
+
+```csharp
+var adapter = new HotChocolateSemanticAdapter(semanticModel);
+
+var request = adapter.Adapt(
+    graphql: """
+        query {
+          product(sku: "SKU-1") {
+            name
+            catalog { category }
+            inventory(available: true) { quantity }
+            pricing { amount currency }
+          }
+        }
+        """);
+
+var result = await foundgineRuntime.ExecuteAsync(request);
+```
+
+Foundgine resolves the request against the application's semantic model, applies authorization, builds a provider-independent execution plan, and executes it — the same rules and capabilities used by GraphQL are also available to REST, automation, and AI agent callers, without duplicating validation or authorization logic per caller.