add aiopenapi3 (#737)

Author: commonism

src/content/tools/aiopenapi3.md

@@ -0,0 +1,20 @@
+---
+name: aiopenapi3
+description: aiopenapi3 is a client library to interface RESTful services using OpenAPI/Swagger description documents, built upon pydantic for data validation/coercion and httpx for transport.
+categories:
+  - fetch-clients
+  - schema-validators
+  - parsers
+link: https://aiopenapi3.readthedocs.io/en/latest/
+languages:
+  python: true
+repo: https://github.com/commonism/aiopenapi3
+oasVersions:
+  v2: true
+  v3: true
+  v3_1: true
+  v3_2: true
+badges:
+  - oas-v32-early
+  - full-spectrum-support
+---