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/flags/body.go

@@ -1,73 +0,0 @@
-// Copyright 2026 The Gitea Authors. All rights reserved.
-// SPDX-License-Identifier: MIT
-
-package flags
-
-import (
-	"fmt"
-	"io"
-	"os"
-
-	"golang.org/x/term"
-)
-
-// stdinPiped reports whether stdin is not a terminal, e.g. when a description
-// is piped from a file, command substitution, or a CI harness.
-func stdinPiped() bool {
-	return !term.IsTerminal(int(os.Stdin.Fd()))
-}
-
-// resolveCreateBody returns the issue/PR description for create commands.
-//
-// Precedence:
-//  1. --description-file (read from the file, or stdin when the path is "-")
-//  2. --description
-//  3. piped stdin
-func resolveCreateBody(description, descriptionFile string, descriptionFileSet, stdinPiped bool, stdin io.Reader) (string, error) {
-	if descriptionFileSet {
-		return readDescriptionSource(descriptionFile, stdin)
-	}
-	if description != "" {
-		return description, nil
-	}
-	if stdinPiped {
-		return readDescriptionStdin(stdin)
-	}
-	return "", nil
-}
-
-// resolveEditBody returns the new issue/PR body when a description flag was
-// provided, or nil when the caller should leave the body unchanged.
-func resolveEditBody(description string, descriptionSet bool, descriptionFile string, descriptionFileSet bool, stdin io.Reader) (*string, error) {
-	if descriptionFileSet {
-		body, err := readDescriptionSource(descriptionFile, stdin)
-		if err != nil {
-			return nil, err
-		}
-		return &body, nil
-	}
-	if descriptionSet {
-		body := description
-		return &body, nil
-	}
-	return nil, nil
-}
-
-func readDescriptionSource(source string, stdin io.Reader) (string, error) {
-	if source == "-" {
-		return readDescriptionStdin(stdin)
-	}
-	data, err := os.ReadFile(source)
-	if err != nil {
-		return "", fmt.Errorf("could not read description file %q: %w", source, err)
-	}
-	return string(data), nil
-}
-
-func readDescriptionStdin(stdin io.Reader) (string, error) {
-	data, err := io.ReadAll(stdin)
-	if err != nil {
-		return "", fmt.Errorf("could not read description from stdin: %w", err)
-	}
-	return string(data), nil
-}