feat(ft): add schema descriptions

apps/emqx_ft/i18n/emqx_ft_schema_i18n.conf

@@ -1,6 +1,17 @@
 emqx_ft_schema {
 
-    local {
+    storage {
+        desc {
+            en: "Storage settings for file transfer."
+            zh: "文件传输的存储设置。"
+        }
+        label: {
+            en: "Storage settings"
+            zh: "存储设置"
+        }
+    }
+
+    local_type {
         desc {
             en: "Use local file system to store uploaded files and temporary data."
             zh: "使用本地文件系统来存储上传的文件和临时数据。"

apps/emqx_ft/src/emqx_ft_schema.erl

@@ -21,7 +21,7 @@
 -include_lib("hocon/include/hoconsc.hrl").
 -include_lib("typerefl/include/types.hrl").
 
--export([namespace/0, roots/0, fields/1, tags/0]).
+-export([namespace/0, roots/0, fields/1, tags/0, desc/1]).
 
 -export([schema/1]).
 
@@ -49,7 +49,8 @@ fields(file_transfer) ->
         {storage, #{
             type => hoconsc:union([
                 hoconsc:ref(?MODULE, local_storage)
-            ])
+            ]),
+            desc => ?DESC("storage")
         }}
     ];
 fields(local_storage) ->
@@ -58,7 +59,7 @@ fields(local_storage) ->
             type => local,
             default => local,
             required => false,
-            desc => ?DESC("local")
+            desc => ?DESC("local_type")
         }},
         {root, #{
             type => binary(),
@@ -67,6 +68,11 @@ fields(local_storage) ->
         }}
     ].
 
+desc(file_transfer) ->
+    "File transfer settings";
+desc(local_storage) ->
+    "File transfer local storage settings".
+
 schema(filemeta) ->
     #{
         roots => [