Edits to the freshly generated project.

render_config/1 uses a hand-rolled heredoc rather than calling Capstone.Config's own encoder-equivalent, even though that codec is compiled locally in this project (lib/capstone/config.ex) and is perfectly reachable from here. That's a deliberate choice, not a limitation: unifying the reader and the writer behind one encoder is explicit future work, not done here. This project's own test/capstone/config_test.exs and test/integration/target_project_test.exs assert the rendered file is readable by Capstone.Config, which is the guarantee that actually matters in the meantime.