wip: working on generator

- Feat: add typedefs' branches

src/compiler/generator/gen_alias.c

@@ -0,0 +1,30 @@
+#include <common/fzl_types.h>
+#include <compiler/internals/gen.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+// Type aliasing
+bool gen_alias(fzl_gen_t *gen, fzl_node_t *node)
+{
+  if (!gen || !node)
+    return false;
+
+  fzl_type_t type;
+  char typecn[256];
+  memset(typecn, 0, sizeof(typecn));
+
+  bool resolved = gen_resolve_type(gen, node->token, &type, typecn);
+  if (!resolved)
+    return false;
+
+  ssize_t slot = gen_resolve_extern_type(gen, typecn);
+  if (slot == -1)
+    type_buf.alias_target =
+        (fzl_extern_type_ref_t){.is_primitive = true, .primitive = type};
+  else
+    type_buf.alias_target =
+        (fzl_extern_type_ref_t){.is_primitive = false, .type_slot = slot};
+
+  return true;
+}