feat: initial DX for gale

[aweris]

The initial version of the new DX of the gale

Introduces:

• With interface that can be implemented by any type that can be used to configure a dagger container.

type With interface {
	WithContainerFunc(container *dagger.Container) *dagger.Container
}

• gale.Env() to configure the execution environment

env := gale.Env()

container = container.With(gale.Load(env)) // configures all tools, services and env values required by `gale`

• gale.Job() to configure the jobs to execute

job, err := g.Job().Load(ctx, "example-golangci-lint", "golangci-lint")
if err != nil {
  return err
}

container = container.With(gale.Load(job))

An example workflow:

job, err := g.Job().Load(ctx, "example-golangci-lint", "golangci-lint")
if err != nil {
  return err
}

dagger.Container().
  From(<runner-image>).
  With(gale.Load(gale.Env()).
  With(gale.Load(job)).
  Sync(ctx)

Depends on #48
Related to #45

[github-actions]

This PR/issue depends on:

• build: bootstrap tools/ghx #48
  By Dependent Issues (🤖). Happy coding!