kitex: add page (#7782)

pages/common/kitex.md

@@ -0,0 +1,21 @@
+# kitex
+
+> Code generation tool provided by the Go RPC framework Kitex.
+> Kitex accepts both thrift and protobuf IDLs, and supports generating a skeleton of a server side project.
+> More information: <https://www.cloudwego.io>.
+
+- Generate client codes when a project is in `$GOPATH`:
+
+`kitex {{path/to/IDL_file.thrift}}`
+
+- Generate client codes when a project is not in `$GOPATH`:
+
+` kitex -module {{github.com/xx-org/xx-name}} {{path/to/IDL_file.thrift}}`
+
+- Generate client codes with protobuf IDL:
+
+`kitex -type protobuf {{path/to/IDL_file.proto}}`
+
+- Generate server codes:
+
+`kitex -service {{svc_name}} {{path/to/IDL_file.thrift}}`