DEV: Add disabled attribute to form templates (#27033)

app/assets/javascripts/discourse/app/components/form-template-field/input.hbs

@@ -24,5 +24,6 @@
     pattern={{@validations.pattern}}
     minlength={{@validations.minimum}}
     maxlength={{@validations.maximum}}
+    disabled={{@attributes.disabled}}
   />
 </div>

app/assets/javascripts/discourse/tests/acceptance/composer-form-template-test.js

@@ -20,6 +20,11 @@ const FORM_TEMPLATES = [
         id: description
         attributes:
           label: "Description"
+      - type: input
+        id: disabled-input
+        attributes: 
+          label: "Disabled input"
+          disabled: true
     `,
   },
   {
@@ -124,6 +129,13 @@ acceptance("Composer Form Template", function (needs) {
       "reply control is open"
     );
 
+    assert.ok(
+      document.querySelector(
+        ".form-template-field__input[name='disabled-input']"
+      ).disabled,
+      "disabled-input is disabled"
+    );
+
     await fillIn(".form-template-field__input[name='full-name']", "John Smith");
 
     await fillIn(