Release 0.0.75 (#329)

🚀  Release 0.0.75
We are excited to announce the latest updates and features that have been added to Langflow! Here’s a summary of the recent changes:

New Features:
- Deploy Langflow using Langchain-Serve: Thanks to the hard work of @deepankarm, Langflow can now be deployed using Langchain-Serve to Jina AI Cloud. This integration brings enhanced functionality and improves the overall performance of Langflow. Just run `langflow --jcloud`.
- Copy and Paste Nodes and Flows: @anovazzi1 and @lucaseduoli have implemented the copy and paste functionality in Langflow. Now you can easily duplicate nodes and flows, improving productivity and workflow efficiency.
- Undo/Redo Functionality: @anovazzi1 and @lucaseduoli have also added an undo/redo feature to LangFlow, allowing you to easily revert and redo changes made to nodes and flows. This enhances the editing experience and provides greater control over your work.

Improvements and Fixes:
- Build: The latest update includes making Langchain-Serve optional, allowing for more flexibility in deployment.
- Documentation: The README has been updated to provide information about JCloud deployment.
- Validation Fixes: @ogabrielluiz has made several updates to improve validation in Langflow, including returning exception messages in responses and adding validation status icons and tooltips to node properties.
- Bug Fixes: Several bug fixes have been implemented, including resizing issues in the chat input, copy and paste bugs in the code area, and padding adjustments in the UI. Special thanks to @anovazzi1 and @lucaseduoli for their contributions in fixing these issues.

We appreciate the contributions from the following members:
- @deepankarm
- @anovazzi1
- @lucaseduoli

Thank you to everyone who has contributed to this release. Your efforts have made Langflow even better! If you have any feedback or suggestions, please don’t hesitate to reach out. Happy coding with Langflow! 🎉