docs: Rewrite Hosting documentation for quality and consistency (#602)

Author: muhsinking

docs.json

@@ -281,6 +281,7 @@
               "references/gpu-types",
               "references/cpu-types",
               "references/security-and-compliance",
+              "hosting/partner-requirements",
               {
                 "group": "Migrations",
                 "pages": [
@@ -306,15 +307,6 @@
                   "sdks/graphql/manage-endpoints",
                   "references/graphql-spec"
                 ]
-              },
-              {
-                "group": "Hosting",
-                "pages": [
-                  "hosting/overview",
-                  "hosting/burn-testing",
-                  "hosting/maintenance-and-reliability",
-                  "hosting/partner-requirements"
-                ]
               }
             ]
           }