Add Stripe connector (#175)

The Stripe Data Connector provides an instant adapter for Engine v3 to
request Stripe resources via GraphQL. 
---------

Co-authored-by: Vishnu Bharathi <[email protected]>

registry/hasura/stripe/README.md

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+# Stripe Connector
+
+## Overview
+
+The Stripe Data Connector provides an instant adapter for Engine v3 to request Stripe resources via GraphQL. This connector is built upon the [REST connector](https://github.com/hasura/ndc-rest) and [Stripe's OpenAPI Specification](https://github.com/stripe/openapi).
+
+- [GitHub Repository](https://github.com/hasura/ndc-stripe)
+
+## Prerequisites
+
+1. Create a [Hasura Cloud account](https://console.hasura.io)
+2. Please ensure you have the [DDN CLI](https://hasura.io/docs/3.0/cli/installation) and
+   [Docker](https://docs.docker.com/engine/install/) installed
+3. [Create a supergraph](https://hasura.io/docs/3.0/getting-started/init-supergraph)
+4. [Create a subgraph](https://hasura.io/docs/3.0/getting-started/init-subgraph)
+
+The steps below explain how to initialize and configure a connector on your local machine (typically for development
+purposes).You can learn how to deploy a connector to Hasura DDN — after it's been configured —
+[here](https://hasura.io/docs/3.0/getting-started/deployment/deploy-a-connector).
+
+## Using the Stripe connector
+
+With the [context set](https://hasura.io/docs/3.0/cli/commands/ddn_context_set/) for an existing subgraph, initialize
+the connector by choosing `hasura/stripe`. When the wizard runs, you'll also be prompted to enter the following env
+vars necessary for your connector to function.
+
+After the CLI initializes the connector, you'll need to:
+
+- [Introspect](https://hasura.io/docs/3.0/cli/commands/ddn_connector_introspect) the source.
+- Add your [models](https://hasura.io/docs/3.0/cli/commands/ddn_model_add) and
+  [commands](https://hasura.io/docs/3.0/cli/commands/ddn_command_add).
+- Create a [new build](https://hasura.io/docs/3.0/cli/commands/ddn_supergraph_build_local).
+- Test it by [running your project along with the connector](https://hasura.io/docs/3.0/cli/commands/ddn_run#examples)
+
+See all available variables [here](https://github.com/hasura/ndc-stripe#environment-variables).
+
+## License
+
+The Hasura Stripe connector is available under the [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0).

registry/hasura/stripe/metadata.json

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+{
+  "overview": {
+    "namespace": "hasura",
+    "description": "The Stripe Data Connector provides an instant adapter for Engine v3 to request Stripe resources via GraphQL",
+    "title": "Stripe Connector",
+    "logo": "logo.png",
+    "tags": [],
+    "latest_version": "v0.2.3"
+  },
+  "author": {
+    "support_email": "[email protected]",
+    "homepage": "https://hasura.io",
+    "name": "Hasura"
+  },
+  "is_verified": true,
+  "is_hosted_by_hasura": true,
+  "source_code": {
+    "is_open_source": true,
+    "repository": "https://github.com/hasura/ndc-stripe",
+    "version": [
+      {
+        "tag": "v0.2.3",
+        "hash": "71956bc9cc3eb1c08c0f22441a8c9d106dc6cea8",
+        "is_verified": true
+      }
+    ]
+  }
+}

registry/hasura/stripe/releases/v0.2.3/connector-packaging.json

@@ -0,0 +1,11 @@
+{
+  "version": "v0.2.3",
+  "uri": "https://github.com/hasura/ndc-stripe/releases/download/v0.2.3/connector-definition.tgz",
+  "checksum": {
+    "type": "sha256",
+    "value": "01c3b462cfc89e78cbf72f8713c59c67d2c13b3054a16f39a584e293bee6ab10"
+  },
+  "source": {
+    "hash": "71956bc9cc3eb1c08c0f22441a8c9d106dc6cea8"
+  }
+}