Add documentation

Author: veewee

README.md

@@ -110,6 +110,7 @@ Available commands:
   inspect         Inspects WSDL file.
   inspect:method  Inspects a method of a WSDL file.
   inspect:type    Inspects types from WSDL file.
+  inspect:ui      Inspects WSDL file through a user interface.  
 ```
 
 ### Listing all contents
@@ -130,6 +131,15 @@ Available commands:
 ./vendor/bin/wsdl inspect:type your.wsdl SomeType
 ```
 
+### UI
+
+Sometimes, you want to inspect multiple types and methods at once.
+This package provides a TUI that allows you to inspect all types and methods in a WSDL file through a single command:
+
+```shell
+./vendor/bin/wsdl inspect:ui your.wsdl
+```
+
 ### Custom WSDL Loader
 
 By default, all CLI tools use the StreamWrapperLoader.