101 featch available variables from previous steps (#8062)

- add outputSchema in workflow step settings
- use outputSchemas to compute step available variables


https://github.com/user-attachments/assets/6b851d8e-625c-49ff-b29c-074cd86cbfee

packages/twenty-front/src/generated-metadata/graphql.ts

@@ -162,6 +162,11 @@ export type ClientConfig = {
   support: Support;
 };
 
+export type ComputeStepOutputSchemaInput = {
+  /** Step JSON format */
+  step: Scalars['JSON']['input'];
+};
+
 export type CreateAppTokenInput = {
   expiresAt: Scalars['DateTime']['input'];
 };
@@ -529,6 +534,7 @@ export type Mutation = {
   authorizeApp: AuthorizeApp;
   challenge: LoginToken;
   checkoutSession: SessionEntity;
+  computeStepOutputSchema: Scalars['JSON']['output'];
   createOIDCIdentityProvider: SetupSsoOutput;
   createOneAppToken: AppToken;
   createOneField: Field;
@@ -625,6 +631,11 @@ export type MutationCheckoutSessionArgs = {
 };
 
 
+export type MutationComputeStepOutputSchemaArgs = {
+  input: ComputeStepOutputSchemaInput;
+};
+
+
 export type MutationCreateOidcIdentityProviderArgs = {
   input: SetupOidcSsoInput;
 };