make help
- Document the usage of the `make help` command to display available Makefile targets Signed-off-by: appleboy <appleboy.tw@gmail.com>
- Add a CLAUDE.md guide describing project purpose, build instructions, architecture, and developer patterns - Add linting and formatting targets (lint, fmt) to Makefile using golangci-lint Signed-off-by: appleboy <appleboy.tw@gmail.com>