NextChat V3.0

**TL;DR:**
We are thrilled to announce that we are currently developing the new V3 of NextChat at branch [`v3`](https://github.com/ChatGPTNextWeb/ChatGPT-Next-Web/tree/v3), which will feature a breathtaking new UI and a host of exciting functionalities. **No action is required at this time!** For developers building on NextChat, please start considering the upcoming major release's impact. We welcome any thoughts or ideas in the Discussions section!

Early Preview: https://v3.nextchat.dev/

**What’s Coming in V3?**
In next few months, we plan to roll out NextChat V3, which will include a completely redesigned user interface and some thrilling new capabilities. Since V3 involves significant refactoring, including potential breaking changes for those developing on NextChat, we want to keep you informed well before the official release.

**Key Features to Anticipate:**
- **Revamped UI**: An entirely fresh look that enhances your user experience.
- **Model Manager Support**: Implementation of multi-model provider management as referenced in issue [#4030](https://github.com/ChatGPTNextWeb/ChatGPT-Next-Web/issues/4030).
- **Function Calling**: This feature is expected to be added post-V3 release.
- **Open Mask Importer**: Also anticipated to be available after the V3 launch.
- **And more...**

**Ongoing Support & Development:**
Please rest assured, before the official rollout of V3, we will continue to iterate and maintain the current V2 on the main branch. Development of the new features and UI for V3 will occur on the `v3` git branch. Post-release, we will also continue to support V2, which will be maintained on the `v2` git branch.

**Anticipated Timeline:**
* [TBD] Complete major feature development.
* [TBD] Merge V3 into the main branch (including Docker images). V2 will continue to be maintained on the v2 branch, with a one-month notice provided prior to any changes.
* [TBD] (Within 3 months post V3 release) Continue bug fixes and maintenance for V2.

We are excited to move forward with these updates and look forward to your feedback and contributions in making V3 even better. Stay tuned for more updates as we progress!