Update README.md

README.md

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-# hiddify-next-core
+# hiddify-next-core
+
+
+## Extension
+
+An extension is something that can be added to hiddify application by a third party. It will add capability to modify configs, do some extra action, show and receive data from users.
+
+This extension will be shown in all Hiddify Platforms such as Android/macOS/Linux/Windows/iOS
+
+[Create an extension](https://github.com/hiddify/hiddify-app-example-extension)
+
+Features and Road map:
+
+- [x] Add Third Party Extension capability
+- [x] Test Extension from Browser without any dependency to android/mac/.... `./cmd.sh extension` the open browser `https://127.0.0.1:12346`
+- [x] Show Custom UI from Extension `github.com/hiddify/hiddify-core/extension.UpdateUI()` 
+- [x] Show Custom Dialog from Extension `github.com/hiddify/hiddify-core/extension.ShowDialog()`
+- [x] Show Alert Dialog from Extension `github.com/hiddify/hiddify-core/extension.ShowMessage()` 
+- [x] Get Data from UI `github.com/hiddify/hiddify-core/extension.SubmitData()` 
+- [x] Save Extension Data from `e.Base.Data`
+- [x] Load Extension Data to `e.Base.Data`
+- [x] Disable / Enable Extension 
+- [x] Update user proxies before connecting `github.com/hiddify/hiddify-core/extension.BeforeAppConnect()` 
+- [x] Run Tiny Independent Instance  `github.com/hiddify/hiddify-core/extension/sdk.RunInstance()` 
+- [x] Parse Any type of configs/url  `github.com/hiddify/hiddify-core/extension/sdk.ParseConfig()` 
+- [ ] ToDo: Add Support for MultiLanguage Interface
+- [ ] ToDo: Custom Extension Outbound
+- [ ] ToDo: Custom Extension Inbound
+- [ ] ToDo: Custom Extension ProxyConfig
+ 
+ Demo Screenshots from HTML:
+ 
+ <img width="531" alt="image" src="https://github.com/user-attachments/assets/0fbef76f-896f-4c45-a6b8-7a2687c47013">
+ <img width="531" alt="image" src="https://github.com/user-attachments/assets/15bccfa0-d03e-4354-9368-241836d82948">
+