[plugin] Library updates (#10070)

* Expose lingui modules to plugins

* Add i18n object to plugin context

* Expose form types

* Update package.json requirements

* Externalize react and mantine when building @inventreedb/ui components

* Externalize lingui packages too

* Extern <AddItemButton />

src/frontend/lib/components/AddItemButton.tsx

@@ -0,0 +1,10 @@
+import { IconPlus } from '@tabler/icons-react';
+
+import { ActionButton, type ActionButtonProps } from './ActionButton';
+
+/**
+ * A generic icon button which is used to add or create a new item
+ */
+export function AddItemButton(props: Readonly<ActionButtonProps>) {
+  return <ActionButton {...props} color='green' icon={<IconPlus />} />;
+}