fix: address code review comments

Signed-off-by: Victor Adossi <[email protected]>

Author: vados-cosmonic

design/mvp/WIT.md

@@ -1028,13 +1028,13 @@ Assume the following WIT package as the initial interface:
 ```wit
 package examples:[email protected];
 
-variant calc-error {
-  integer-overflow,
-  integer-underflow,
-  unexpected,
-}
-
 interface calc {
+  variant calc-error {
+    integer-overflow,
+    integer-underflow,
+    unexpected,
+  }
+
   add: func(x: i32, y: i32) -> result<i32, calc-error>;
 }
 ```
@@ -1057,7 +1057,7 @@ interface calc {
 }
 ```
 
-At this point, consumers of the WIT can enable feature `minus` through their relevant tooling and get access to the `sub` function.
+At this point, consumers of the WIT can enable feature `fgates-calc-minus` through their relevant tooling and get access to the `sub` function.
 
 Note that if we had to *add* a new variant to `calc-error`, this would be a *breaking change* for most if not all downstream bindgen tooling (i.e. the enum would become a new object, incompatible with previous code).
 
@@ -1087,13 +1087,13 @@ Assume the following WIT package as the initial interface:
 ```wit
 package examples:[email protected];
 
-variant calc-error {
-  integer-overflow,
-  integer-underflow,
-  unexpected,
-}
-
 interface calc {
+  variant calc-error {
+    integer-overflow,
+    integer-underflow,
+    unexpected,
+  }
+
   add-one: func(x: i32) -> result<i32, calc-error>;
 
   @since(version = 0.1.1)