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>

modules/filelock/filelock.go

@@ -1,70 +0,0 @@
-// Copyright 2026 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package filelock
-
-import (
-	"fmt"
-	"os"
-	"time"
-)
-
-const (
-	// DefaultTimeout is the default timeout for acquiring a file lock.
-	DefaultTimeout = 5 * time.Second
-
-	// FileLockPollInterval is how often to retry acquiring the file lock.
-	FileLockPollInterval = 50 * time.Millisecond
-)
-
-// Locker provides file-based locking with timeout.
-type Locker struct {
-	path    string
-	timeout time.Duration
-}
-
-// New creates a Locker for the given lock file path.
-func New(lockPath string, timeout time.Duration) *Locker {
-	return &Locker{
-		path:    lockPath,
-		timeout: timeout,
-	}
-}
-
-// WithLock executes fn while holding the lock.
-func (l *Locker) WithLock(fn func() error) (retErr error) {
-	unlock, err := l.Acquire()
-	if err != nil {
-		return err
-	}
-	defer func() {
-		if unlockErr := unlock(); unlockErr != nil && retErr == nil {
-			retErr = fmt.Errorf("failed to release file lock: %w", unlockErr)
-		}
-	}()
-
-	return fn()
-}
-
-// Acquire acquires the file lock and returns an unlock function.
-// The caller must call the unlock function to release the lock.
-func (l *Locker) Acquire() (unlock func() error, err error) {
-	file, err := os.OpenFile(l.path, os.O_CREATE|os.O_RDWR, 0o600)
-	if err != nil {
-		return nil, fmt.Errorf("failed to open lock file: %w", err)
-	}
-
-	if err := lockFile(file, l.timeout); err != nil {
-		file.Close()
-		return nil, fmt.Errorf("failed to acquire file lock: %w", err)
-	}
-
-	return func() error {
-		unlockErr := unlockFile(file)
-		closeErr := file.Close()
-		if unlockErr != nil {
-			return unlockErr
-		}
-		return closeErr
-	}, nil
-}