feat: Add inbox details endpoint (#5549)

This change targets the public API and is related to the Inbox with channel type API.
Exposes public inbox details under /public/api/v1/inboxes/{inbox_identifier}. This allows access to feature flags and business hours configured for the inbox.

ref: #5514

swagger/swagger.json

@@ -691,6 +691,38 @@
         }
       }
     },
+    "/public/api/v1/inboxes/{inbox_identifier}": {
+      "parameters": [
+        {
+          "$ref": "#/parameters/public_inbox_identifier"
+        }
+      ],
+      "get": {
+        "tags": [
+          "Inbox API"
+        ],
+        "operationId": "get-details-of-a-inbox",
+        "summary": "Inbox details",
+        "description": "Get the details of an inbox",
+        "security": [
+
+        ],
+        "responses": {
+          "200": {
+            "description": "Success",
+            "schema": {
+              "$ref": "#/definitions/public_inbox"
+            }
+          },
+          "401": {
+            "description": "Unauthorized"
+          },
+          "404": {
+            "description": "The given inbox does not exist"
+          }
+        }
+      }
+    },
     "/public/api/v1/inboxes/{inbox_identifier}/contacts": {
       "parameters": [
         {
@@ -5470,6 +5502,76 @@
         }
       }
     },
+    "public_inbox": {
+      "type": "object",
+      "properties": {
+        "identifier": {
+          "type": "string",
+          "description": "Inbox identifier"
+        },
+        "name": {
+          "type": "string",
+          "description": "Name of the inbox"
+        },
+        "timezone": {
+          "type": "string",
+          "description": "The timezone defined on the inbox"
+        },
+        "working_hours": {
+          "type": "array",
+          "description": "The working hours defined on the inbox",
+          "items": {
+            "type": "object",
+            "properties": {
+              "day_of_week": {
+                "type": "integer",
+                "description": "Day of the week as a number. Sunday -> 0, Saturday -> 6"
+              },
+              "open_all_day": {
+                "type": "boolean",
+                "description": "Whether or not the business is open the whole day"
+              },
+              "closed_all_day": {
+                "type": "boolean",
+                "description": "Whether or not the business is closed the whole day"
+              },
+              "open_hour": {
+                "type": "integer",
+                "description": "Opening hour. Can be null if closed all day"
+              },
+              "open_minutes": {
+                "type": "integer",
+                "description": "Opening minute. Can be null if closed all day"
+              },
+              "close_hour": {
+                "type": "integer",
+                "description": "Closing hour. Can be null if closed all day"
+              },
+              "close_minutes": {
+                "type": "integer",
+                "description": "Closing minute. Can be null if closed all day"
+              }
+            }
+          }
+        },
+        "working_hours_enabled": {
+          "type": "boolean",
+          "description": "Whether of not the working hours are enabled on the inbox"
+        },
+        "csat_survey_enabled": {
+          "type": "boolean",
+          "description": "Whether of not the Customer Satisfaction survey is enabled on the inbox"
+        },
+        "greeting_enabled": {
+          "type": "boolean",
+          "description": "Whether of not the Greeting Message is enabled on the inbox"
+        },
+        "identity_validation_enabled": {
+          "type": "boolean",
+          "description": "Whether of not the User Identity Validation is enforced on the inbox"
+        }
+      }
+    },
     "account_create_update_payload": {
       "type": "object",
       "properties": {