Parse secret inputs in reusable workflows (#41)

Secrets can be passed to reusable workflows, either explicitly by key or
implicitly by `inherit`:

https://docs.github.com/en/actions/using-workflows/reusing-workflows#using-inputs-and-secrets-in-a-reusable-workflow

Reviewed-on: https://gitea.com/gitea/act/pulls/41
Reviewed-by: Jason Song <i@wolfogre.com>
Co-authored-by: Galen Abell <galen@galenabell.com>
Co-committed-by: Galen Abell <galen@galenabell.com>

pkg/jobparser/model.go

@@ -88,6 +88,7 @@ type Job struct {
 	Outputs        map[string]string         `yaml:"outputs,omitempty"`
 	Uses           string                    `yaml:"uses,omitempty"`
 	With           map[string]interface{}    `yaml:"with,omitempty"`
+	RawSecrets     yaml.Node                 `yaml:"secrets,omitempty"`
 }
 
 func (j *Job) Clone() *Job {
@@ -109,6 +110,7 @@ func (j *Job) Clone() *Job {
 		Outputs:        j.Outputs,
 		Uses:           j.Uses,
 		With:           j.With,
+		RawSecrets:     j.RawSecrets,
 	}
 }