Enable the VarDeclaration type inference from the createVar parameters (#1646)

Co-authored-by: Adam Skoufis <[email protected]>

Author: plesiecki

.changeset/little-mangos-type.md

@@ -0,0 +1,5 @@
+---
+"@vanilla-extract/css": patch
+---
+
+Swap the order of `createVar`'s overloads to enable inference of `VarDelcaration` type

packages/css/src/vars.ts

@@ -38,11 +38,11 @@ const buildPropertyRule = ({
   ...(initialValue != null ? { initialValue } : {}),
 });
 
+export function createVar(debugId?: string): CSSVarFunction;
 export function createVar(
   declaration: VarDeclaration,
   debugId?: string,
 ): CSSVarFunction;
-export function createVar(debugId?: string): CSSVarFunction;
 export function createVar(
   debugIdOrDeclaration?: string | VarDeclaration,
   debugId?: string,