Added option to output tasks before the checkout of the project

.changelog/41.added.srt

@@ -0,0 +1 @@
+Added pre checkout steps to the git feature

src/generator/features/git.py

@@ -1,7 +1,7 @@
 """This module defines the Git-related features and configurations for Jenkins pipelines."""
 
 from abc import ABC
-from typing import Any, Dict, Optional, Type
+from typing import Any, Dict, List, Optional, Type
 
 from pydantic import BaseModel, Field, field_validator
 
@@ -102,6 +102,10 @@ class GitConfig(FeatureConfig):
         default=None,
         description="The checkout configuration. If use_simple_checkout is true, this will be ignored.",
     )
+    pre_checkout_tasks: Optional[List[str]] = Field(
+        default=[],
+        description="List of tasks to run before running the checkout.",
+    )
     retry_count: Optional[int] = Field(
         default=1,
         description=(

src/generator/templates/git.mako

@@ -2,6 +2,10 @@
 
 <%def name="additional_functions()">
 def projectCheckout() {
+% for pre_task in feature_config.pre_checkout_tasks:
+    ${pre_task}
+% endfor
+
 % if feature_config.retry_count > 1:
     retry(count: ${feature_config.retry_count}) {
 % endif