update spf13/pflag package to be consistent with pier

chore(*): add test cover and workflow in github

1. add test cover for coverage report in workflow
2. add workflow for github action

chore(*): update bitxhub sdk and kit version

1. remove some unused code
2. add .golangci.yml for linter rule
3. add make prepare command

Bump bitxhub sdk and kit version to v1.0.0-rc1

chore(readme): add basic descriptions