6181 workflows create a custom code executor (#6235)

Closes #6181

## Testing
- download Altair graphql dev tool https://altairgraphql.dev/#download
- create a file locally `test.ts` containing:
```
export const handler = async (event: object, context: object) => {
  return { test: 'toto', data: event['data'] };
}
```
- play those requests in Altair:
mutation UpsertFunction($file: Upload!) {
  upsertFunction(name: "toto", file: $file)
}

mutation ExecFunction {
  executeFunction(name:"toto", payload: {data: "titi"})
}
- it will run the local driver, add those env variable to test with
lambda driver
```
CUSTOM_CODE_ENGINE_DRIVER_TYPE=lambda
LAMBDA_REGION=eu-west-2
LAMBDA_ROLE=<ASK_ME>
```

packages/twenty-server/src/engine/integrations/serverless/drivers/base-serverless.driver.ts

@@ -0,0 +1,33 @@
+import { join } from 'path';
+
+import { FileFolder } from 'src/engine/core-modules/file/interfaces/file-folder.interface';
+
+import { ServerlessFunctionEntity } from 'src/engine/metadata-modules/serverless-function/serverless-function.entity';
+import { SOURCE_FILE_NAME } from 'src/engine/integrations/serverless/drivers/constants/source-file-name';
+import { readFileContent } from 'src/engine/integrations/file-storage/utils/read-file-content';
+import { compileTypescript } from 'src/engine/integrations/serverless/drivers/utils/compile-typescript';
+import { FileStorageService } from 'src/engine/integrations/file-storage/file-storage.service';
+
+export class BaseServerlessDriver {
+  getFolderPath(serverlessFunction: ServerlessFunctionEntity) {
+    return join(
+      FileFolder.ServerlessFunction,
+      serverlessFunction.workspaceId,
+      serverlessFunction.id,
+    );
+  }
+
+  async getCompiledCode(
+    serverlessFunction: ServerlessFunctionEntity,
+    fileStorageService: FileStorageService,
+  ) {
+    const folderPath = this.getFolderPath(serverlessFunction);
+    const fileStream = await fileStorageService.read({
+      folderPath,
+      filename: SOURCE_FILE_NAME,
+    });
+    const typescriptCode = await readFileContent(fileStream);
+
+    return compileTypescript(typescriptCode);
+  }
+}