Customer's API: Add proposal views

Author: NickSchimek

source/includes/customers/projects/_proposals.md

@@ -17,7 +17,13 @@
     "updated_at": "2022-09-08T14:03:12.359-07:00",
     "private_link": "https://app.jetbuilt.com/projects/111214/proposals/304402",
     "public_link": null,
-    "expiry_public_link": null
+    "expiry_public_link": null,
+    "views": [
+      {
+        "date": "2025-02-28T17:02:50.519-08:00"
+      }
+      ...
+    ]
   },
   ...
 ]
@@ -44,3 +50,9 @@ Parameter | Description
 PROJECT_ID | The ID of the project
 page | A specific page of results
 expiry_public_link | if set to `true` a public link is generated that expires after 5 minutes
+min_created_at | Get proposals created after the specified date time.
+max_created_at | Get proposals created before the specified date time.
+min_updated_at | Get proposals updated after the specified date time.
+max_updated_at | Get proposals updated before the specified date time.
+min_view_date | Get proposals that had views after the specified date time.
+max_view_date | Get proposals that had views before the specified date time.