add clio to the list of tools (#695)

Author: baywet

src/content/tools/clio.md

@@ -0,0 +1,23 @@
+---
+name: Clio
+description: Clio is a CLI to apply Overlays to OpenAPI descriptions. It's small, blazing fast and dedicated to applying Overlays really well. It's also available as a .net library in case you'd want to integrate overlay processing in your application.
+categories:
+  - misc
+  - converters
+languages:
+  csharp: true
+  cli: true
+  docker: true
+oasVersions:
+  v2: true
+  v3: true
+  v3_1: true
+  v3_2: true
+oaiSpecs:
+  oas: true
+  overlays: true
+badges:
+  - oas-v32-early
+  - overlays-pioneer
+repo: https://github.com/BinkyLabs/openapi-overlays-dotnet
+---