Add forms demo page

apps/showcase/doc/forms/dynamic/DynamicFormLabel.vue

@@ -0,0 +1,21 @@
+<template>
+    <label :for="htmlFor">
+        <slot />
+    </label>
+</template>
+
+<script>
+export default {
+    name: 'DynamicFormLabel',
+    inject: {
+        $fcDynamicFormField: {
+            default: undefined
+        }
+    },
+    computed: {
+        htmlFor() {
+            return this.$fcDynamicFormField?.$props.groupId;
+        }
+    }
+};
+</script>