feat: add notion oauth provider (#11528)

Co-authored-by: Ruben Fiszel <ruben@windmill.dev>

backend/oauth_connect.json

@@ -241,6 +241,14 @@
       "type": "web_server"
     }
   },
+  "notion": {
+    "auth_url": "https://api.notion.com/v1/oauth/authorize",
+    "token_url": "https://api.notion.com/v1/oauth/token",
+    "scopes": [],
+    "extra_params": {
+      "owner": "user"
+    }
+  },
   "linkedin": {
     "auth_url": "https://www.linkedin.com/oauth/v2/authorization",
     "token_url": "https://www.linkedin.com/oauth/v2/accessToken",

frontend/src/lib/components/AuthSettings.svelte

@@ -96,7 +96,8 @@
 		'apify',
 		'docusign',
 		'salesforce',
-		'outreach'
+		'outreach',
+		'notion'
 	]
 	// Providers whose registry entry (`backend/oauth_connect.json`) carries a
 	// `sandbox` URL block. Each one gets a sibling `<name>_sandbox` dropdown