add an aws chalice integration

RELEASE.md

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+Release type: patch
+
+Added support for aws chalice, as well as unit tests and documentation, which illustrates example usage.
+The options available for the graphiql view are listed in the documentation.

docs/README.md

@@ -51,6 +51,7 @@
 - [FastAPI](./integrations/fastapi.md)
 - [Flask](./integrations/flask.md)
 - [Sanic](./integrations/sanic.md)
+- [Chalice](./integrations/chalice.md)
 - [Pydantic **experimental**](./integrations/pydantic.md)
 
 ## Operations

docs/integrations/chalice.md

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+---
+title: Chalice
+---
+
+# Chalice
+
+Strawberry comes with an AWS Chalice integration. It provides a view that you can
+use to serve your GraphQL schema:
+
+Use the Chalice CLI to create a new project
+
+```shell
+chalice new-project badger-project
+cd badger-project
+```
+
+Replace the contents of app.py with the following:
+
+```python
+from chalice import Chalice
+from chalice.app import Request, Response
+
+import strawberry
+from strawberry.chalice.views import GraphQLView
+
+app = Chalice(app_name="BadgerProject")
+
+
+@strawberry.type
+class Query:
+    @strawberry.field
+    def greetings(self) -> str:
+        return "hello from the illustrious stack badger"
+
+
+@strawberry.type
+class Mutation:
+    @strawberry.mutation
+    def echo(self, string_to_echo: str) -> str:
+        return string_to_echo
+
+
+schema = strawberry.Schema(query=Query, mutation=Mutation)
+view = GraphQLView(schema=schema, render_graphiql=True)
+
+
+@app.route("/graphql", methods=["GET", "POST"], content_types=["application/json"])
+def handle_graphql() -> Response:
+    request: Request = app.current_request
+    result = view.execute_request(request)
+    return result
+```
+
+And then run `chalice local` to start the localhost
+
+```shell
+chalice local
+```
+
+GraphiQL will be hosted on localhost:8000/graphql
+
+## Options
+
+The `GraphQLView` accepts two options at the moment:
+
+- `schema`: mandatory, the schema created by `strawberry.Schema`.
+- `graphiql`: optional, defaults to `True`, whether to enable the GraphiQL interface.