feat!: rebuild tea on Cobra with explicit noun/verb commands (#1126)

- **switch tea to the Cobra command tree:** `internal/app` wires the packages from parts 1–4 into explicit noun/verb commands with `--repo`, `--json` / `--jq`, `--sudo` and `--debug`; `main.go` points at it. Build, release and docs tooling (`tools/cli-docs`, Makefile, goreleaser, snap, CI) and README / CONTRIBUTING are updated.
- **remove the urfave/cli command tree:** deletes `cmd/`, `modules/`, the old integration tests, contrib completion scripts and the generated `docs/CLI.md`, and drops their dependencies. This commit only deletes.

## Breaking changes

This is a breaking release. It requires Gitea 28 or newer; configuration moves to separate `config.yml` and `hosts.yml` files and requires fresh authentication, and command names, aliases, flags and output formats change. `docs/migration-1.0.md` maps every old command, flag and environment variable to its replacement.

## Issues

fixes #1118
fixes #1116
fixes #1115
fixes #1094
fixes #1091
fixes #1073
fixes #1052
fixes #1032
fixes #1023
fixes #966
fixes #908
fixes #833
fixes #831
fixes #817
fixes #804
fixes #779
fixes #770
fixes #737
fixes #697
fixes #726
fixes #677
fixes #672
fixes #633
fixes #632
fixes #560
fixes #556
fixes #523
fixes #516
fixes #510
fixes #504
fixes #500
fixes #482
fixes #406
fixes #403
fixes #373
fixes #351
fixes #344
fixes #326
fixes #325
fixes #323
fixes #246
fixes #240
fixes #232
fixes #197
fixes #172
fixes #141
fixes #69
fixes #1110
fixes #569
fixes #480
fixes #666
fixes #670
fixes #457
fixes #643
fixes #498
fixes #490
fixes #1069
fixes #834
fixes #602
fixes #328
fixes #417
fixes #571
fixes #1029
fixes #489
fixes #1050
fixes #162
fixes #430
fixes #1087
fixes #683

Reviewed-on: https://gitea.com/gitea/tea/pulls/1126
Reviewed-by: TheFox0x7 <95654+thefox0x7@noreply.gitea.com>

tests/integration/config_lock_unix_test.go

@@ -1,80 +0,0 @@
-// Copyright 2026 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-//go:build unix
-
-package integration
-
-import (
-	"fmt"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"testing"
-	"time"
-
-	"gitea.dev/tea/modules/config"
-)
-
-func TestConfigLock_CrossProcess(t *testing.T) {
-	tmpDir, err := os.MkdirTemp("", "tea-lock-test")
-	if err != nil {
-		t.Fatalf("failed to create temp dir: %v", err)
-	}
-	defer os.RemoveAll(tmpDir)
-
-	lockPath := filepath.Join(tmpDir, "config.yml.lock")
-
-	unlock, err := config.AcquireConfigLockForTesting(lockPath, 5*time.Second)
-	if err != nil {
-		t.Fatalf("failed to acquire lock: %v", err)
-	}
-	defer func() {
-		if err := unlock(); err != nil {
-			t.Fatalf("failed to release lock: %v", err)
-		}
-	}()
-
-	script := fmt.Sprintf(`
-package main
-
-import (
-	"os"
-	"syscall"
-)
-
-func main() {
-	file, err := os.OpenFile(%q, os.O_CREATE|os.O_RDWR, 0o600)
-	if err != nil {
-		os.Exit(2)
-	}
-	defer file.Close()
-
-	err = syscall.Flock(int(file.Fd()), syscall.LOCK_EX|syscall.LOCK_NB)
-	if err != nil {
-		os.Exit(0)
-	}
-
-	syscall.Flock(int(file.Fd()), syscall.LOCK_UN)
-	os.Exit(1)
-}
-`, lockPath)
-
-	scriptPath := filepath.Join(tmpDir, "locktest.go")
-	if err := os.WriteFile(scriptPath, []byte(script), 0o600); err != nil {
-		t.Fatalf("failed to write test script: %v", err)
-	}
-
-	cmd := exec.Command("go", "run", scriptPath)
-	if err := cmd.Run(); err != nil {
-		if exitErr, ok := err.(*exec.ExitError); ok {
-			if exitErr.ExitCode() == 1 {
-				t.Error("subprocess acquired lock when it should have been held")
-			} else if exitErr.ExitCode() == 2 {
-				t.Errorf("subprocess failed to open lock file: %v", err)
-			}
-		} else {
-			t.Errorf("subprocess execution failed: %v", err)
-		}
-	}
-}