feat(ast): add ast_assignements. Similar to how redirections are handled.

src/utils/ast/ast_assignement.c

@@ -0,0 +1,36 @@
+#include "ast_assignement.h"
+
+#include <stdlib.h>
+
+bool ast_is_assignement(struct ast *node)
+{
+    return node != NULL && node->type == AST_ASSIGNEMENT;
+}
+
+struct ast_assignement *ast_get_assignement(struct ast *node)
+{
+    if (node == NULL || node->type != AST_ASSIGNEMENT)
+        return NULL;
+    return (struct ast_assignement *)node->data;
+}
+
+struct ast *ast_create_assignement(char *name, char *value)
+{
+    struct ast_assignement *assignement_data = malloc(sizeof(struct ast_assignement));
+    if (!assignement_data)
+        return NULL;
+
+    assignement_data->name = name;
+    assignement_data->value = value;
+
+    return ast_create(AST_ASSIGNEMENT, assignement_data);
+}
+
+void ast_free_assignement(struct ast_assignement *assignement_data)
+{
+    if (assignement_data == NULL)
+        return;
+    free(assignement_data->name);
+    free(assignement_data->value);
+    free(assignement_data);
+}