Add token for getting reusable workflows from local private repos (#38)

Partially fixes https://gitea.com/gitea/act_runner/issues/91

If the repository is private, we need to provide the token to the caller workflows to access the called reusable workflows from the same repository.

Reviewed-on: https://gitea.com/gitea/act/pulls/38
Reviewed-by: Jason Song <i@wolfogre.com>
Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-committed-by: Zettat123 <zettat123@gmail.com>

act/runner/runner.go

@@ -66,6 +66,14 @@ type Config struct {
 	JobLoggerLevel        *log.Level                   // the level of job logger
 }
 
+func (c Config) GetToken() string {
+	token := c.Secrets["GITHUB_TOKEN"]
+	if c.Secrets["GITEA_TOKEN"] != "" {
+		token = c.Secrets["GITEA_TOKEN"]
+	}
+	return token
+}
+
 type caller struct {
 	runContext *RunContext
 }