feat: editor file attachments (#194)

* fix current slider value

* WIP

* changes to extension attributes

* update command title

apps/client/src/features/editor/components/attachment/upload-attachment-action.tsx

@@ -0,0 +1,31 @@
+import { handleAttachmentUpload } from "@docmost/editor-ext";
+import { uploadFile } from "@/features/page/services/page-service.ts";
+import { notifications } from "@mantine/notifications";
+
+export const uploadAttachmentAction = handleAttachmentUpload({
+  onUpload: async (file: File, pageId: string): Promise<any> => {
+    try {
+      return await uploadFile(file, pageId);
+    } catch (err) {
+      notifications.show({
+        color: "red",
+        message: err?.response.data.message,
+      });
+      throw err;
+    }
+  },
+  validateFn: (file) => {
+    if (file.type.includes("image/") || file.type.includes("video/")) {
+      return false;
+    }
+    if (file.size / 1024 / 1024 > 50) {
+      notifications.show({
+        color: "red",
+        message: `File exceeds the 50 MB attachment limit`,
+      });
+      return false;
+    }
+
+    return true;
+  },
+});