feat: add http adapter (#231)

* feat: add http adapter

lib/notification/adapter/http.md

@@ -0,0 +1,43 @@
+### HTTP Adapter
+
+This is a generic adapter for sending notifications via HTTP requests.
+You can leverage this adapter to integrate with various webhooks or APIs that accept HTTP requests. (e.g. Supabase
+Functions, a Node.js server, etc.)
+
+HTTP adapter supports a `authToken` field, which can be used to include an authorization token in the request headers.
+Your token would be included as a Bearer token in the `Authorization` header, which is a common method for securing API requests.
+
+Request Details:
+<details>
+Request Method: POST  
+
+Headers:
+
+```
+Content Type: `application/json`
+Authorization: Bearer {your-optional-auth-token}
+```
+
+Body:
+
+```json
+{
+  "jobId": "mg1waX4RHmIzL5NDYtYp-",
+  "provider": "immoscout",
+  "timestamp": "2024-06-15T12:34:56Z",
+  "listings": [
+    {
+      "address": "Str. 123, Bielefeld, Germany",
+      "description": "Möbliert: Einziehen & wohlfühlen: Neu möbliert.",
+      "id": "123456789",
+      "imageUrl": "https://<target-url>.com/listings/123456789.jpg",
+      "price": "1.240 €",
+      "size": "38 m²",
+      "title": "Schöne 1-Zimmer-Wohnung in Bielefeld",
+      "url": "https://<target-url>.com/listings/123456789"
+    }
+  ]
+}
+```
+
+</details>