Support automatic conversion to uncurried via @@toUncurried and reformat

Add `@@toUncurried` to the file and reformat. The file will turn into uncurried syntax.

Author: cristianoc

CHANGELOG.md

@@ -16,6 +16,8 @@
 
 - Introduce experimental uncurried by default mode. Can be turned on mid-file by adding standalone annotation `@@uncurried`. For experimentation only. https://github.com/rescript-lang/rescript-compiler/pull/5796
 
+- Adding `@@toUncurried` to the file and reformat will convert to uncurried syntax
+
 #### :boom: Breaking Change
 
 - Remove support for the legacy Reason syntax. Existing Reason code can be converted to ReScript syntax using ReScript 9 as follows:

lib/4.06.1/unstable/js_compiler.ml

@@ -58330,7 +58330,16 @@ and printAttribute ?(standalone = false) ~state
         ],
       Doc.hardLine )
   | _ ->
-    if id.txt = "uncurried" then state.uncurried_by_default <- true;
+    let id =
+      match id.txt with
+      | "uncurried" ->
+        state.uncurried_by_default <- true;
+        id
+      | "toUncurried" ->
+        state.uncurried_by_default <- true;
+        {id with txt = "uncurried"}
+      | _ -> id
+    in
     ( Doc.group
         (Doc.concat
            [

lib/4.06.1/unstable/js_playground_compiler.ml

@@ -58330,7 +58330,16 @@ and printAttribute ?(standalone = false) ~state
         ],
       Doc.hardLine )
   | _ ->
-    if id.txt = "uncurried" then state.uncurried_by_default <- true;
+    let id =
+      match id.txt with
+      | "uncurried" ->
+        state.uncurried_by_default <- true;
+        id
+      | "toUncurried" ->
+        state.uncurried_by_default <- true;
+        {id with txt = "uncurried"}
+      | _ -> id
+    in
     ( Doc.group
         (Doc.concat
            [

lib/4.06.1/whole_compiler.ml

@@ -113325,7 +113325,16 @@ and printAttribute ?(standalone = false) ~state
         ],
       Doc.hardLine )
   | _ ->
-    if id.txt = "uncurried" then state.uncurried_by_default <- true;
+    let id =
+      match id.txt with
+      | "uncurried" ->
+        state.uncurried_by_default <- true;
+        id
+      | "toUncurried" ->
+        state.uncurried_by_default <- true;
+        {id with txt = "uncurried"}
+      | _ -> id
+    in
     ( Doc.group
         (Doc.concat
            [

res_syntax/src/res_printer.ml

@@ -5264,7 +5264,16 @@ and printAttribute ?(standalone = false) ~state
         ],
       Doc.hardLine )
   | _ ->
-    if id.txt = "uncurried" then state.uncurried_by_default <- true;
+    let id =
+      match id.txt with
+      | "uncurried" ->
+        state.uncurried_by_default <- true;
+        id
+      | "toUncurried" ->
+        state.uncurried_by_default <- true;
+        {id with txt = "uncurried"}
+      | _ -> id
+    in
     ( Doc.group
         (Doc.concat
            [