appleboy 419eff8b22
build: revamp make targets and update build instructions
- Replace `make build_linux_amd64` and `make build_linux_arm64` with `make build_docker`
- Add a help target with usage instructions and target descriptions
- Update `fmt` to install the latest version of `gofumpt`
- Add descriptions for `vet`, `fmt-check`, `test`, `install`, `build`, `ssh-server`, and `clean` targets
- Remove several build targets (`amd64`, `i386`, `arm64`, `arm`)
- Remove the `coverage` and `version` targets

Signed-off-by: appleboy <appleboy.tw@gmail.com>
2025-04-14 14:12:46 +08:00
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