feat(workflows): add dispatch, view, enable and disable subcommands (#952)

## Summary

- Add `tea actions workflows dispatch` to trigger `workflow_dispatch` events with `--ref`, `--input key=value`, and `--follow` for log tailing
- Add `tea actions workflows view` to show workflow details
- Add `tea actions workflows enable` and `disable` to toggle workflow state
- Rewrite `workflows list` to use the Workflow API instead of file listing
- Remove dead `WorkflowsList` print function that used `ContentsResponse`
- Update `CLI.md` and `example-workflows.md` with usage documentation and examples

## Motivation

Enable re-triggering specific workflows from the CLI, which is essential for AI-driven PR flows where a specific workflow needs to be re-run after pushing changes.

Leverages the 5 workflow API endpoints already supported by the Go SDK (v0.24.1) from go-gitea/gitea#33545:
- `ListRepoActionWorkflows`
- `GetRepoActionWorkflow`
- `DispatchRepoActionWorkflow` (with `returnRunDetails` support)
- `EnableRepoActionWorkflow`
- `DisableRepoActionWorkflow`

## New commands

\`\`\`
tea actions workflows
├── list          (rewritten to use Workflow API)
├── view <id>     (new)
├── dispatch <id> (new)
├── enable <id>   (new)
└── disable <id>  (new)
\`\`\`

### Usage examples

\`\`\`bash
# Dispatch workflow on current branch
tea actions workflows dispatch deploy.yml

# Dispatch with specific ref and inputs
tea actions workflows dispatch deploy.yml --ref main --input env=staging --input version=1.2.3

# Dispatch and follow logs
tea actions workflows dispatch ci.yml --ref feature/my-pr --follow

# View workflow details
tea actions workflows view deploy.yml

# Enable/disable workflows
tea actions workflows enable deploy.yml
tea actions workflows disable deploy.yml --confirm
\`\`\`

## Test plan

- [x] `go build ./...` passes
- [x] `go test ./...` passes
- [x] `go vet ./...` passes
- [x] `make lint` — 0 issues
- [x] `make docs-check` — CLI.md is up to date
- [x] Manual test: `tea actions workflows list` shows workflows from API
- [x] Manual test: `tea actions workflows dispatch <workflow> --ref main` triggers a run
- [x] Manual test: `tea actions workflows view <workflow>` shows details

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Reviewed-on: https://gitea.com/gitea/tea/pulls/952
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Co-committed-by: Bo-Yi Wu <appleboy.tw@gmail.com>

cmd/actions/workflows/enable.go

@@ -0,0 +1,48 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package workflows
+
+import (
+	stdctx "context"
+	"fmt"
+
+	"code.gitea.io/tea/cmd/flags"
+	"code.gitea.io/tea/modules/context"
+
+	"github.com/urfave/cli/v3"
+)
+
+// CmdWorkflowsEnable represents a sub command to enable a workflow
+var CmdWorkflowsEnable = cli.Command{
+	Name:        "enable",
+	Usage:       "Enable a workflow",
+	Description: "Enable a disabled workflow in the repository",
+	ArgsUsage:   "<workflow-id>",
+	Action:      runWorkflowsEnable,
+	Flags:       flags.AllDefaultFlags,
+}
+
+func runWorkflowsEnable(ctx stdctx.Context, cmd *cli.Command) error {
+	if cmd.Args().Len() == 0 {
+		return fmt.Errorf("workflow ID is required")
+	}
+
+	c, err := context.InitCommand(cmd)
+	if err != nil {
+		return err
+	}
+	if err := c.Ensure(context.CtxRequirement{RemoteRepo: true}); err != nil {
+		return err
+	}
+	client := c.Login.Client()
+
+	workflowID := cmd.Args().First()
+	_, err = client.EnableRepoActionWorkflow(c.Owner, c.Repo, workflowID)
+	if err != nil {
+		return fmt.Errorf("failed to enable workflow: %w", err)
+	}
+
+	fmt.Printf("Workflow %s enabled successfully\n", workflowID)
+	return nil
+}