feat(module): add PlanForce to Module interface with stubs

internal/modules/gittools/gittools.go

@@ -3,6 +3,7 @@ package gittools
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"strings"
 
@@ -72,3 +73,7 @@ func (m Module) Verify(ctx context.Context) error {
 	}
 	return nil
 }
+
+func (m Module) PlanForce(ctx context.Context) (module.Plan, error) {
+	return module.Plan{}, errors.New("PlanForce not implemented")
+}