Add helper for floor level (#28268)

* Add helper for floor level

* Update src/translations/en.json

Co-authored-by: Petar Petrov <MindFreeze@users.noreply.github.com>

---------

Co-authored-by: Petar Petrov <MindFreeze@users.noreply.github.com>

src/panels/config/areas/dialog-floor-registry-detail.ts

@@ -145,6 +145,10 @@ class DialogFloorDetail extends LitElement {
                 "ui.panel.config.floors.editor.level"
               )}
               type="number"
+              .helper=${this.hass.localize(
+                "ui.panel.config.floors.editor.level_helper"
+              )}
+              helperPersistent
             ></ha-textfield>
 
             <ha-icon-picker

src/translations/en.json

@@ -2383,6 +2383,7 @@
             "name": "Name",
             "icon": "Icon",
             "level": "Level",
+            "level_helper": "Used to determine the default floor icon. Does not influence the floor order.",
             "name_required": "Name is required",
             "floor_id": "Floor ID",
             "unknown_error": "Unknown error",