feat：新增 organizations 指令（#45）

tea organizations 對等的日常操作：
- organizations list：GET /user/orgs，輸出 name/full_name/website/
  location/description/visibility（與 teai orgs 工作流命令同一
  端點，但輸出完整欄位）
- organizations create：POST /orgs，--name 必填，可選 --full-name/
  --description/--website/--location/--visibility；寫入需 --yes
- organizations delete：DELETE /orgs/{org}，組織名為位置參數
  （tea 相容）；寫入需 --yes

驗收測試涵蓋端點、payload、--yes 閘門（未確認不發請求）與
值域檢查；並以本機建置對 Gitea 實測 list 輸出欄位與 tea 一致。

internal/cli/dailyops_commands.go

@@ -1,5 +1,5 @@
 // dailyops_commands.go — 日常操作命令的 CLI 接線（#8）：issues、pulls、
-// labels、milestones、releases、repos、api（tea 對等指令）。
+// labels、milestones、releases、repos、organizations、api（tea 對等指令）。
 //
 // 規則：
 //   - 寫入類命令（create／close／comment／merge…）一律要求 --yes，
@@ -33,6 +33,7 @@ func init() {
 	register(&command{name: "milestones", usage: "里程碑（跨倉庫總覽；list/create 管理單倉庫）", run: runMilestones})
 	register(&command{name: "releases", usage: "發佈清單（list）", run: runReleases})
 	register(&command{name: "repos", usage: "倉庫查詢（list）", run: runRepos})
+	register(&command{name: "organizations", usage: "組織管理（list/create/delete；tea organizations 對等）", run: runOrganizations})
 	register(&command{name: "api", usage: "任意 API 呼叫（--method/--data；寫入動詞需 --yes）", run: runAPIDirect})
 }
 
@@ -1097,3 +1098,134 @@ func runAPIDirect(env *Env, args []string) error {
 	}
 	return err
 }
+
+// ---- organizations（#45，tea organizations 對等）----
+
+// orgListFields 是 organizations 清單的欄位定義。
+func orgListFields() []gitea.Field {
+	return []gitea.Field{
+		{Name: "name"}, {Name: "full_name"}, {Name: "website"},
+		{Name: "location"}, {Name: "description"}, {Name: "visibility"},
+	}
+}
+
+// runOrganizations：teai organizations [list|create|delete] …。
+// tea 對等：organizations list 列出自己可存取的組織；create／delete 是
+// 寫入操作，比照慣例要求 --yes。
+func runOrganizations(env *Env, args []string) error {
+	if len(args) == 0 {
+		return &ErrUsage{Msg: "organizations 需要子命令：list | create | delete"}
+	}
+	sub, rest := args[0], args[1:]
+	switch sub {
+	case "list":
+		return runOrganizationsList(env, rest)
+	case "create":
+		return runOrganizationsCreate(env, rest)
+	case "delete":
+		return runOrganizationsDelete(env, rest)
+	default:
+		return &ErrUsage{Msg: fmt.Sprintf("organizations 未知子命令 %q（可用：list | create | delete）", sub)}
+	}
+}
+
+// runOrganizationsList：teai organizations list。
+// GET /user/orgs（與 teai orgs 工作流命令同一端點，但輸出完整欄位）。
+func runOrganizationsList(env *Env, args []string) error {
+	fs := flag.NewFlagSet("teai organizations list", flag.ContinueOnError)
+	fs.SetOutput(env.Err)
+	if err := parseFlags(fs, args); err != nil {
+		return err
+	}
+	if fs.NArg() != 0 {
+		return &ErrUsage{Msg: "organizations list 不接受位置參數"}
+	}
+	ops, err := newOpsClient(env)
+	if err != nil {
+		return err
+	}
+	orgs, err := ops.ListMyOrganizations(context.Background())
+	if err != nil {
+		return err
+	}
+	p := printer(env)
+	rows := make([]gitea.Values, 0, len(orgs))
+	for i := range orgs {
+		org := &orgs[i]
+		rows = append(rows, gitea.Values{
+			org.Account(), org.FullName, org.Website,
+			org.Location, org.Description, org.Visibility,
+		})
+	}
+	return p.PrintList(orgListFields(), rows)
+}
+
+// runOrganizationsCreate：teai organizations create --name … [--full-name …]
+// [--description …] [--website …] [--location …] [--visibility public|limited|private] --yes。
+// tea 以位置參數給組織名；teai 慣例用 --name（語義等價，命名與其他 create 一致）。
+func runOrganizationsCreate(env *Env, args []string) error {
+	fs := flag.NewFlagSet("teai organizations create", flag.ContinueOnError)
+	fs.SetOutput(env.Err)
+	name := fs.String("name", "", "組織帳號名（必填，同 tea 的位置參數）")
+	fullName := fs.String("full-name", "", "顯示名稱")
+	desc := fs.String("description", "", "說明")
+	website := fs.String("website", "", "網站")
+	location := fs.String("location", "", "所在地")
+	visibility := fs.String("visibility", "", "可見度：public|limited|private（預設服務端決定）")
+	yes := fs.Bool("yes", false, "確認寫入")
+	if err := parseFlags(fs, args); err != nil {
+		return err
+	}
+	if strings.TrimSpace(*name) == "" {
+		return &ErrUsage{Msg: "organizations create 需要 --name"}
+	}
+	switch *visibility {
+	case "", "public", "limited", "private":
+	default:
+		return &ErrUsage{Msg: "organizations create 的 --visibility 需為 public|limited|private"}
+	}
+	if err := requireYes(*yes, "organizations create"); err != nil {
+		return err
+	}
+	ops, err := newOpsClient(env)
+	if err != nil {
+		return err
+	}
+	org, err := ops.CreateOrganization(context.Background(), *name, *fullName, *desc, *website, *location, *visibility)
+	if err != nil {
+		return err
+	}
+	return printer(env).PrintOne(orgListFields(), gitea.Values{
+		org.Account(), org.FullName, org.Website,
+		org.Location, org.Description, org.Visibility,
+	})
+}
+
+// runOrganizationsDelete：teai organizations delete <name> --yes。
+// tea 相容：組織名作為位置參數。
+func runOrganizationsDelete(env *Env, args []string) error {
+	fs := flag.NewFlagSet("teai organizations delete", flag.ContinueOnError)
+	fs.SetOutput(env.Err)
+	yes := fs.Bool("yes", false, "確認寫入")
+	if err := parseFlags(fs, args); err != nil {
+		return err
+	}
+	if fs.NArg() != 1 {
+		return &ErrUsage{Msg: "organizations delete 需要恰好一個組織名"}
+	}
+	orgName := strings.TrimSpace(fs.Arg(0))
+	if orgName == "" {
+		return &ErrUsage{Msg: "organizations delete 需要組織名"}
+	}
+	if err := requireYes(*yes, "organizations delete"); err != nil {
+		return err
+	}
+	ops, err := newOpsClient(env)
+	if err != nil {
+		return err
+	}
+	if err := ops.DeleteOrganization(context.Background(), orgName); err != nil {
+		return err
+	}
+	return printer(env).PrintOne([]gitea.Field{{Name: "name"}, {Name: "state"}}, gitea.Values{orgName, "deleted"})
+}