feat: export CompiledCircuit from codegened TS (#3589)

Author: TomAFrench

tooling/noir_codegen/src/index.ts

@@ -8,7 +8,7 @@ const codegenPrelude = `/* Autogenerated file, do not edit! */
 
 /* eslint-disable */
 
-import { Noir, InputMap } from "@noir-lang/noir_js"
+import { Noir, InputMap, CompiledCircuit } from "@noir-lang/noir_js"
 `;
 
 const codegenFunction = (
@@ -19,8 +19,11 @@ const codegenFunction = (
   const args = function_signature.inputs.map(([name]) => `${name}`).join(', ');
   const args_with_types = function_signature.inputs.map(([name, type]) => `${name}: ${type}`).join(', ');
 
-  return `export async function ${name}(${args_with_types}): Promise<${function_signature.returnValue}> {
-  const program = new Noir(${JSON.stringify(compiled_program)});
+  return `
+export const ${name}_circuit: CompiledCircuit = ${JSON.stringify(compiled_program)};
+
+export async function ${name}(${args_with_types}): Promise<${function_signature.returnValue}> {
+  const program = new Noir(${name}_circuit);
   const args: InputMap = { ${args} };
   const { returnValue } = await program.execute(args);
   return returnValue as ${function_signature.returnValue};