chore: enable coder inbox by default (#17077)

Add a flag to enable Coder Inbox by default, as well as supporting disabling the feature.

coderd/apidoc/docs.go

@@ -12658,6 +12658,14 @@ const docTemplate = `{
                     "description": "How often to query the database for queued notifications.",
                     "type": "integer"
                 },
+                "inbox": {
+                    "description": "Inbox settings.",
+                    "allOf": [
+                        {
+                            "$ref": "#/definitions/codersdk.NotificationsInboxConfig"
+                        }
+                    ]
+                },
                 "lease_count": {
                     "description": "How many notifications a notifier should lease per fetch interval.",
                     "type": "integer"
@@ -12783,6 +12791,14 @@ const docTemplate = `{
                 }
             }
         },
+        "codersdk.NotificationsInboxConfig": {
+            "type": "object",
+            "properties": {
+                "enabled": {
+                    "type": "boolean"
+                }
+            }
+        },
         "codersdk.NotificationsSettings": {
             "type": "object",
             "properties": {

coderd/apidoc/swagger.json

@@ -11369,6 +11369,14 @@
 					"description": "How often to query the database for queued notifications.",
 					"type": "integer"
 				},
+				"inbox": {
+					"description": "Inbox settings.",
+					"allOf": [
+						{
+							"$ref": "#/definitions/codersdk.NotificationsInboxConfig"
+						}
+					]
+				},
 				"lease_count": {
 					"description": "How many notifications a notifier should lease per fetch interval.",
 					"type": "integer"
@@ -11494,6 +11502,14 @@
 				}
 			}
 		},
+		"codersdk.NotificationsInboxConfig": {
+			"type": "object",
+			"properties": {
+				"enabled": {
+					"type": "boolean"
+				}
+			}
+		},
 		"codersdk.NotificationsSettings": {
 			"type": "object",
 			"properties": {