chore(actions): support cron schedule task (#26655)

Replace #22751 

1. only support the default branch in the repository setting.
2. autoload schedule data from the schedule table after starting the
service.
3. support specific syntax like `@yearly`, `@monthly`, `@weekly`,
`@daily`, `@hourly`

## How to use

See the [GitHub Actions
document](https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedule)
for getting more detailed information.

```yaml
on:
  schedule:
    - cron: '30 5 * * 1,3'
    - cron: '30 5 * * 2,4'

jobs:
  test_schedule:
    runs-on: ubuntu-latest
    steps:
      - name: Not on Monday or Wednesday
        if: github.event.schedule != '30 5 * * 1,3'
        run: echo "This step will be skipped on Monday and Wednesday"
      - name: Every time
        run: echo "This step will always run"
```

Signed-off-by: Bo-Yi.Wu <appleboy.tw@gmail.com>

---------


Co-authored-by: Jason Song <i@wolfogre.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

modules/actions/workflows.go

@@ -95,18 +95,25 @@ func GetEventsFromContent(content []byte) ([]*jobparser.Event, error) {
 	return events, nil
 }
 
-func DetectWorkflows(gitRepo *git.Repository, commit *git.Commit, triggedEvent webhook_module.HookEventType, payload api.Payloader) ([]*DetectedWorkflow, error) {
+func DetectWorkflows(
+	gitRepo *git.Repository,
+	commit *git.Commit,
+	triggedEvent webhook_module.HookEventType,
+	payload api.Payloader,
+) ([]*DetectedWorkflow, []*DetectedWorkflow, error) {
 	entries, err := ListWorkflows(commit)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
 	workflows := make([]*DetectedWorkflow, 0, len(entries))
+	schedules := make([]*DetectedWorkflow, 0, len(entries))
 	for _, entry := range entries {
 		content, err := GetContentFromEntry(entry)
 		if err != nil {
-			return nil, err
+			return nil, nil, err
 		}
+
 		events, err := GetEventsFromContent(content)
 		if err != nil {
 			log.Warn("ignore invalid workflow %q: %v", entry.Name(), err)
@@ -114,6 +121,14 @@ func DetectWorkflows(gitRepo *git.Repository, commit *git.Commit, triggedEvent w
 		}
 		for _, evt := range events {
 			log.Trace("detect workflow %q for event %#v matching %q", entry.Name(), evt, triggedEvent)
+			if evt.IsSchedule() {
+				dwf := &DetectedWorkflow{
+					EntryName:    entry.Name(),
+					TriggerEvent: evt.Name,
+					Content:      content,
+				}
+				schedules = append(schedules, dwf)
+			}
 			if detectMatched(gitRepo, commit, triggedEvent, payload, evt) {
 				dwf := &DetectedWorkflow{
 					EntryName:    entry.Name(),
@@ -125,7 +140,7 @@ func DetectWorkflows(gitRepo *git.Repository, commit *git.Commit, triggedEvent w
 		}
 	}
 
-	return workflows, nil
+	return workflows, schedules, nil
 }
 
 func detectMatched(gitRepo *git.Repository, commit *git.Commit, triggedEvent webhook_module.HookEventType, payload api.Payloader, evt *jobparser.Event) bool {