feat(status-page): add help text for 'Description' in monitor edit status page

src/lang/en.json

@@ -306,6 +306,7 @@
     "Show Tags": "Show Tags",
     "Hide Tags": "Hide Tags",
     "Description": "Description",
+    "descriptionHelpText": "Shown on the monitor details page. Markdown is allowed and sanitized (preserves spaces and indentation) before display.",
     "No monitors available.": "No monitors available.",
     "Add one": "Add one",
     "No Monitors": "No Monitors",

src/pages/EditMonitor.vue

@@ -818,7 +818,8 @@
                             <!-- Description -->
                             <div class="my-3">
                                 <label for="description" class="form-label">{{ $t("Description") }}</label>
-                                <input id="description" v-model="monitor.description" type="text" class="form-control">
+<input id="description" v-model="monitor.description" type="text" class="form-control">
+                                <div class="form-text">{{ $t("descriptionHelpText") }}</div>
                             </div>
 
                             <div class="my-3">