- Implement buffer_open_file/string, buffer_read, buffer_close in v0/src/buffer.c - Add tests in v0/tests/test_buffer.c and test_buffer.txt; register tests in v0/tests/test.c - Update v0/include.mk and Makefile Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>