Add Barbacane API gateway (#696)

Author: ndreno

src/content/tools/barbacane.md

@@ -0,0 +1,44 @@
+---
+name: Barbacane
+description: Spec-driven API gateway that compiles OpenAPI specs into portable artifacts with WASM middleware plugins for validation, authentication, rate limiting, and more.
+categories:
+  - gateways
+  - data-validators
+link: https://github.com/barbacane-dev/Barbacane
+repo: https://github.com/barbacane-dev/Barbacane
+languages:
+  rust: true
+oaiSpecs:
+  oas: true
+  overlays: false
+  arazzo: false
+oasVersions:
+  v2: false
+  v3: true
+  v3_1: true
+  v3_2: true
+---
+
+## Overview
+
+Barbacane is a spec-driven API gateway that compiles OpenAPI 3.x specifications into portable `.bca` artifacts. The compiled artifact contains routes, validation schemas, and WASM middleware plugins, making the OpenAPI spec the single source of truth for gateway behavior.
+
+## Features
+
+- Compiles OpenAPI 3.x specs into self-contained gateway artifacts
+- Request validation against JSON Schema (body, path, query, headers)
+- WASM plugin system with 21 built-in plugins (auth, rate limiting, caching, CORS, CEL/OPA authorization, and more)
+- AsyncAPI 3.x support with Kafka and NATS dispatchers
+- Compile-time safety checks (route conflicts, schema complexity, circular refs)
+- Distributed tracing (OpenTelemetry) and Prometheus metrics
+- Control plane with PostgreSQL for fleet management
+
+## Usage
+
+```bash
+# Compile an OpenAPI spec into a gateway artifact
+barbacane compile --spec api.yaml -m barbacane.yaml -o api.bca
+
+# Serve the compiled artifact
+barbacane serve --artifact api.bca
+```