File utilities and datatype implementation for a C-based code generator (#5)

Co-authored-by: Abdelrahman Said <said.abdelrahman@flawlessai.com>
Reviewed-on: #5
Co-authored-by: Abdelrahman <said.abdelrahman89@gmail.com>
Co-committed-by: Abdelrahman <said.abdelrahman89@gmail.com>

tests/wapptest.c

@@ -56,6 +56,7 @@ int main(void) {
       test_str8_rsplit,
       test_str8_rsplit_with_max,
       test_str8_join,
+      test_str8_from_bytes,
       test_str8_list_get,
       test_str8_list_push_front,
       test_str8_list_push_back,