chore(deps): update dependency golangci/golangci-lint to v2.1.2

See merge request !388

chore(deps): update dependency gitlab-com/gl-infra/terra-transformer to v1.31.16

See merge request !389

This is a very limited implementation for adding ruby support for
common template copier.

For now it is limited to the following files:
- `Gemfile`: refers to the gemspec in case of a Gem. For other ruby
  projects it adds a Gemfile with `gitlab-styles` and `rspec`
- `spec/spec_helper.rb`: Regular spec helper with some defaults
- `.tool-versions`: referring to the latest ruby.
- `.gitlab-ci.yml`: with default tasks from `common-ci-tasks`.
- `.rubocop(_todo).yml`: including gitlab-styles and an optional
  ignore file.

For gitlab-org/ruby/gems/labkit-ruby#48

feat: add basic ruby support

See merge request !387