feat(integrations): add support for adyen (#2902)

## Describe your changes

- Add support for Adyen

## Issue ticket number and link
[EXT-162](https://linear.app/nango/issue/EXT-162/add-support-for-adyen)

docs-v2/integrations/all/adyen.mdx

@@ -0,0 +1,36 @@
+---
+title: Adyen
+sidebarTitle: Adyen
+---
+
+API configuration: [`adyen`](https://nango.dev/providers.yaml)
+
+
+## Features
+
+| Features | Status |
+| - | - |
+| [Auth (OAuth)](/integrate/guides/authorize-an-api) | ✅ |
+| [Sync data](/integrate/guides/sync-data-from-an-api) | ✅ |
+| [Perform workflows](/integrate/guides/perform-workflows-with-an-api) | ✅ |
+| [Proxy requests](/integrate/guides/proxy-requests-to-an-api) | ✅ |
+| [Receive webhooks](/integrate/guides/receive-webhooks-from-an-api) | 🚫 (time to contribute: <48h) |
+
+<Tip>We can implement missing features in &lt;48h, just ask for it in the [community](https://nango.dev/slack).</Tip>
+
+## Getting started
+
+-   [How to register your Oauth client](https://docs.adyen.com/development-resources/oauth/integration/#step-1-register-your-client)
+-   [OAuth related docs](https://docs.adyen.com/development-resources/oauth/integration/)
+-   [List of OAuth scopes](https://docs.adyen.com/development-resources/oauth/scopes)
+-   [Adyen API versioning](https://docs.adyen.com/development-resources/versioning/)
+-   [Adyen API docs](https://docs.adyen.com/development-resources/)
+
+<Tip>Need help getting started? Get help in the [community](https://nango.dev/slack).</Tip>
+
+## API gotchas
+
+- You can choose between `live` and `test` for your connectionConfig environment when adding a connection on Nango.
+- Additionally, depending on the resource in your request, you can specify your desired resource. For example, use `kyc` for the manage legal entities resource.
+
+<Note>Add Getting Started links and Gotchas by [editing this page](https://github.com/nangohq/nango/tree/master/docs-v2/integrations/all/adyen.mdx)</Note>

docs-v2/integrations/payment.mdx

@@ -4,6 +4,7 @@
 </Tip>
 
 <CardGroup cols={4}>
+    <Card title="Adyen" href="/integrations/all/adyen" color="#68a063" />
     <Card title="Braintree" href="/integrations/all/braintree" color="#68a063" />
     <Card title="Bill" href="/integrations/all/bill" color="#68a063" />
     <Card title="Buildium" href="/integrations/all/buildium" color="#68a063" />

docs-v2/mint.json

@@ -315,6 +315,7 @@
             "pages": [
                 "integrations/all/accelo",
                 "integrations/all/adobe",
+                "integrations/all/adyen",
                 "integrations/all/affinity",
                 "integrations/all/aircall",
                 "integrations/all/airtable",

packages/shared/providers.yaml

@@ -78,6 +78,39 @@ adobe-umapi:
             title: Client ID
             description: The Client ID from the OAuth Server-to-Server enabled project on developer portal
 
+adyen:
+    display_name: Adyen
+    categories:
+        - payment
+    auth_mode: OAUTH2
+    authorization_url: https://ca-${connectionConfig.environment}.adyen.com/ca/ca/oauth/connect.shtml
+    token_url: https://oauth-${connectionConfig.environment}.adyen.com/v1/token
+    scope_separator: ' '
+    token_request_auth_method: basic
+    authorization_params:
+        response_type: code
+    token_params:
+        grant_type: authorization_code
+    refresh_params:
+        grant_type: refresh_token
+    proxy:
+        base_url: https://${connectionConfig.resource}-${connectionConfig.environment}.adyen.com
+    docs: https://docs.nango.dev/integrations/all/adyen
+    connection_config:
+        environment:
+            type: string
+            title: Environment
+            description: The environment to use
+            pattern: '^(live|test)$'
+            example: live|test
+        resource:
+            type: string
+            title: Resource
+            description: The resource to use for your various requests
+            pattern: '^[a-z0-9_-]+$'
+            example: kyc
+            suffix: -(live|test).adyen.com
+
 affinity:
     display_name: Affinity
     categories: