feat: add repository webhook management (#798)

## Summary

This PR adds support for organization-level and global webhooks in the tea CLI tool.

## Changes Made

### Organization Webhooks
- Added `--org` flag to webhook commands to operate on organization-level webhooks
- Implemented full CRUD operations for org webhooks (create, list, update, delete)
- Extended TeaContext to support organization scope

### Global Webhooks
- Added `--global` flag with placeholder implementation
- Ready for when Gitea SDK adds global webhook API methods

### Technical Details
- Updated context handling to support org/global scopes
- Modified all webhook subcommands (create, list, update, delete)
- Maintained backward compatibility for repository webhooks
- Updated tests and documentation

## Usage Examples

```bash
# Repository webhooks (existing)
tea webhooks list
tea webhooks create https://example.com/hook --events push

# Organization webhooks (new)
tea webhooks list --org myorg
tea webhooks create https://example.com/hook --org myorg --events push,pull_request

# Global webhooks (future)
tea webhooks list --global
```

## Testing
- All existing tests pass
- Updated test expectations for new descriptions
- Manual testing of org webhook operations completed

Closes: webhook management feature request
Reviewed-on: https://gitea.com/gitea/tea/pulls/798
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Ross Golder <ross@golder.org>
Co-committed-by: Ross Golder <ross@golder.org>

cmd/webhooks/create.go

@@ -0,0 +1,122 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package webhooks
+
+import (
+	stdctx "context"
+	"fmt"
+	"strings"
+
+	"code.gitea.io/tea/cmd/flags"
+	"code.gitea.io/tea/modules/context"
+
+	"code.gitea.io/sdk/gitea"
+	"github.com/urfave/cli/v3"
+)
+
+// CmdWebhooksCreate represents a sub command of webhooks to create webhook
+var CmdWebhooksCreate = cli.Command{
+	Name:        "create",
+	Aliases:     []string{"c"},
+	Usage:       "Create a webhook",
+	Description: "Create a webhook in repository, organization, or globally",
+	ArgsUsage:   "<webhook-url>",
+	Action:      runWebhooksCreate,
+	Flags: append([]cli.Flag{
+		&cli.StringFlag{
+			Name:  "type",
+			Usage: "webhook type (gitea, gogs, slack, discord, dingtalk, telegram, msteams, feishu, wechatwork, packagist)",
+			Value: "gitea",
+		},
+		&cli.StringFlag{
+			Name:  "secret",
+			Usage: "webhook secret",
+		},
+		&cli.StringFlag{
+			Name:  "events",
+			Usage: "comma separated list of events",
+			Value: "push",
+		},
+		&cli.BoolFlag{
+			Name:  "active",
+			Usage: "webhook is active",
+			Value: true,
+		},
+		&cli.StringFlag{
+			Name:  "branch-filter",
+			Usage: "branch filter for push events",
+		},
+		&cli.StringFlag{
+			Name:  "authorization-header",
+			Usage: "authorization header",
+		},
+	}, flags.AllDefaultFlags...),
+}
+
+func runWebhooksCreate(ctx stdctx.Context, cmd *cli.Command) error {
+	if cmd.Args().Len() == 0 {
+		return fmt.Errorf("webhook URL is required")
+	}
+
+	c := context.InitCommand(cmd)
+	client := c.Login.Client()
+
+	webhookType := gitea.HookType(cmd.String("type"))
+	url := cmd.Args().First()
+	secret := cmd.String("secret")
+	active := cmd.Bool("active")
+	branchFilter := cmd.String("branch-filter")
+	authHeader := cmd.String("authorization-header")
+
+	// Parse events
+	eventsList := strings.Split(cmd.String("events"), ",")
+	events := make([]string, len(eventsList))
+	for i, event := range eventsList {
+		events[i] = strings.TrimSpace(event)
+	}
+
+	config := map[string]string{
+		"url":          url,
+		"http_method":  "post",
+		"content_type": "json",
+	}
+
+	if secret != "" {
+		config["secret"] = secret
+	}
+
+	if branchFilter != "" {
+		config["branch_filter"] = branchFilter
+	}
+
+	if authHeader != "" {
+		config["authorization_header"] = authHeader
+	}
+
+	var hook *gitea.Hook
+	var err error
+	if c.IsGlobal {
+		return fmt.Errorf("global webhooks not yet supported in this version")
+	} else if len(c.Org) > 0 {
+		hook, _, err = client.CreateOrgHook(c.Org, gitea.CreateHookOption{
+			Type:   webhookType,
+			Config: config,
+			Events: events,
+			Active: active,
+		})
+	} else {
+		hook, _, err = client.CreateRepoHook(c.Owner, c.Repo, gitea.CreateHookOption{
+			Type:   webhookType,
+			Config: config,
+			Events: events,
+			Active: active,
+		})
+	}
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("Webhook created successfully (ID: %d)\n", hook.ID)
+	return nil
+}