docs: document waitpoint token API endpoints (#3130)

Adds REST API documentation for the 5 waitpoint token endpoints
(`/api/v1/waitpoints/tokens`), including create, list, retrieve,
complete, and HTTP callback. Also adds the `publicAccessToken` security
scheme used by the complete endpoint.

<!-- mintlify-editor-comments:start -->
Mintlify
---
0 threads from 0 users in Mintlify

- No unresolved comments
<!-- mintlify-editor-comments:end -->

<!-- mintlify-comment-->

<a
href="https://dashboard.mintlify.com/trigger/trigger/editor/docs%2Fdocument-waitpoint-endpoints?source=pr_comment"
target="_blank" rel="noopener noreferrer"><picture><source
media="(prefers-color-scheme: dark)"
srcset="https://d3gk2c5xim1je2.cloudfront.net/assets/open-mintlify-editor-dark.svg"><source
media="(prefers-color-scheme: light)"
srcset="https://d3gk2c5xim1je2.cloudfront.net/assets/open-mintlify-editor-light.svg"><img
src="https://d3gk2c5xim1je2.cloudfront.net/assets/open-mintlify-editor-light.svg"
alt="Open in Mintlify Editor"></picture></a>

<!-- /mintlify-comment -->

docs/docs.json

@@ -302,6 +302,16 @@
               "management/deployments/promote"
             ]
           },
+          {
+            "group": "Waitpoints API",
+            "pages": [
+              "management/waitpoints/create",
+              "management/waitpoints/list",
+              "management/waitpoints/retrieve",
+              "management/waitpoints/complete",
+              "management/waitpoints/complete-callback"
+            ]
+          },
           {
             "group": "Query API",
             "pages": ["management/query/execute"]