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>

cmd/comments/body.go

@@ -1,37 +0,0 @@
-// Copyright 2026 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package comments
-
-import "io"
-
-// resolveBody picks the comment body from the non-interactive sources, in
-// precedence order:
-//
-//  1. the positional argument (kept first for back-compat with the historical
-//     'tea comment <idx> "<body>"' shorthand),
-//  2. the -d/--description flag (mirrors the body flag on 'issue create',
-//     'issue edit' and 'pr create'),
-//  3. piped stdin.
-//
-// stdin is only read when stdinPiped is true (a non-TTY stdin, e.g. CI,
-// subshells or agent harnesses) and no body was supplied otherwise, so the
-// command never blocks reading an interactive terminal when a body is already
-// given. An empty result means the caller should fall back to the editor (when
-// interactive) or error out.
-func resolveBody(positional, description string, stdinPiped bool, stdin io.Reader) (string, error) {
-	if len(positional) != 0 {
-		return positional, nil
-	}
-	if len(description) != 0 {
-		return description, nil
-	}
-	if stdinPiped {
-		stdinBytes, err := io.ReadAll(stdin)
-		if err != nil {
-			return "", err
-		}
-		return string(stdinBytes), nil
-	}
-	return "", nil
-}