refactor and rename folder to group (#106)

* rebase upstream

* rebase

* trim no need line

* trim no need line

* trim no need line

* update doc

* remove update

* remove no need

* remove no need

* goctl add jwt support

* goctl add jwt support

* goctl add jwt support

* goctl support import

* goctl support import

* support return ()

* support return ()

* revert

* format api

* refactor and rename folder to group

Co-authored-by: kingxt <dream4kingxt@163.com>

example/bookstore/api/bookstore.api

@@ -1,33 +1,33 @@
 type (
-	addReq struct {
-		book  string `form:"book"`
-		price int64  `form:"price"`
-	}
+    addReq struct {
+        book string `form:"book"`
+        price int64 `form:"price"`
+    }
 
-	addResp struct {
-		ok bool `json:"ok"`
-	}
+    addResp struct {
+        ok bool `json:"ok"`
+    }
 )
 
 type (
-	checkReq struct {
-		book string `form:"book"`
-	}
+    checkReq struct {
+        book string `form:"book"`
+    }
 
-	checkResp struct {
-		found bool  `json:"found"`
-		price int64 `json:"price"`
-	}
+    checkResp struct {
+        found bool `json:"found"`
+        price int64 `json:"price"`
+    }
 )
 
 service bookstore-api {
     @server(
         handler: AddHandler
     )
-    get /add(addReq) returns(addResp)
+    get /add (addReq) returns (addResp)
 
     @server(
         handler: CheckHandler
     )
-    get /check(checkReq) returns(checkResp)
+    get /check (checkReq) returns (checkResp)
 }