docs: add README

Author: achyuki

docs/FoldDevtools.png

@@ -0,0 +1,38 @@
+<div align="center">
+
+<img src="FoldDevtools.png" width="160" height="160" alt="logo" />
+
+# FoldDevtools
+
+</div>
+
+> Using Chrome Devtools to debug Webview on Android.
+
+| <img src="Screenshot.jpg" width="216" height="480" /> | [Download from releases](https://github.com/achyuki/FoldDevtools/releases) |
+-|-
+
+# Features
+
+* Debugging local WebView using root
+* Debugging remote browser through address
+* Force-enable WebView debugging with XPosed
+* Using devtools through floating window
+
+# Rootless
+
+For non-rooted Android devices, you need to manually forward the WebView debug socket to a local port using adb, and then connect using FoldDevtools remote mode.  
+Termux:
+```
+# Get the debug localsocket name of WebView
+su -c cat /proc/net/unix | grep devtools_remote
+# 0000000000000000: 00000002 00000000 00010000 0001 01 xxxxxxx @webview_devtools_remote_<pid>
+
+# Perform port forwarding
+adb forward tcp:9222 localabstract:webview_devtools_remote_<pid>
+```
+Then use remote mode to connect to 127.0.0.1:9222 in FoldDevtools.
+
+
+## License
+
+Licensed under the [GPL-3.0](https://www.gnu.org/licenses/gpl-3.0.html) License.