chore(upgrade): urfave/cli from v2 to v3 (#8035)

urfave/cli  v2 will eventually become unmaintained, switch over to v3 which is the latest supported version.

Note: the `docs` command would be a lot of work to restore with v3 ([the package is still in alpha](https://github.com/urfave/cli-docs)) An alternative to avoid a breaking change would be to not upgrade from v2 to v3 for that reason alone.
Note: these commits were cherry-picked from https://code.forgejo.org/forgefriends/forgefriends
Note: it is best reviewed side by side with no display of whitespace changes (there are a lot of those when converting vars to func).

- a few functional changes were necessary and are noted in context in the file changes tab
- https://cli.urfave.org/migrate-v2-to-v3/ upgrade instructions were followed in the most minimal way possible
- upgrade gof3 to v3.10.8 which includes and upgrade from urfave/cli  v2 to urfave/cli  v3
- upgrade gitlab.com/gitlab-org/api/client-go v0.129.0 because it is an indirect dependency of gof3 and requires a change because of a deprecated field that otherwise triggers a lint error but nothing else otherwise
- verified that the [script](https://codeberg.org/forgejo/docs/src/branch/next/scripts/cli-docs.sh) that generates the [CLI documentation](https://codeberg.org/forgejo/docs/src/branch/next/scripts/cli-docs.sh) still works. There are cosmetic differences and the **help** subcommand is no longer advertised (although it is still supported) but the `--help` option is advertised as expected so it is fine.
- end-to-end tests [passed](https://code.forgejo.org/forgejo/end-to-end/pulls/667) (they use the Forgejo CLI to some extent)

## Checklist

The [contributor guide](https://forgejo.org/docs/next/contributor/) contains information that will be helpful to first time contributors. There also are a few [conditions for merging Pull Requests in Forgejo repositories](https://codeberg.org/forgejo/governance/src/branch/main/PullRequestsAgreement.md). You are also welcome to join the [Forgejo development chatroom](https://matrix.to/#/#forgejo-development:matrix.org).

### Tests

- I added test coverage for Go changes...
  - [ ] in their respective `*_test.go` for unit tests.
  - [ ] in the `tests/integration` directory if it involves interactions with a live Forgejo server.
- I added test coverage for JavaScript changes...
  - [ ] in `web_src/js/*.test.js` if it can be unit tested.
  - [ ] in `tests/e2e/*.test.e2e.js` if it requires interactions with a live Forgejo server (see also the [developer guide for JavaScript testing](https://codeberg.org/forgejo/forgejo/src/branch/forgejo/tests/e2e/README.md#end-to-end-tests)).

### Documentation

- [ ] I created a pull request [to the documentation](https://codeberg.org/forgejo/docs) to explain to Forgejo users how to use this change.
- [x] I did not document these changes and I do not expect someone else to do it.

### Release notes

- [ ] I do not want this change to show in the release notes.
- [ ] I want the title to show in the release notes with a link to this pull request.
- [x] I want the content of the `release-notes/<pull request number>.md` to be be used for the release notes instead of the title.

<!--start release-notes-assistant-->

## Release notes
<!--URL:https://codeberg.org/forgejo/forgejo-->
- Breaking features
  - [PR](https://codeberg.org/forgejo/forgejo/pulls/8035): <!--number 8035 --><!--line 0 --><!--description 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-->The `forgejo docs` command is deprecated and CLI errors are now displayed on stderr instead of stdout. These breaking changes happened because the package used to parse the command line arguments was [upgraded from v2 to v3](https://cli.urfave.org/migrate-v2-to-v3/). A [separate project was initiated](https://github.com/urfave/cli-docs) to re-implement the `docs` command, but it is not yet production ready.<!--description-->
<!--end release-notes-assistant-->

Co-authored-by: limiting-factor <limiting-factor@posteo.com>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8035
Reviewed-by: Gusted <gusted@noreply.codeberg.org>

cmd/admin_auth_stmp.go

@@ -4,6 +4,7 @@
 package cmd
 
 import (
+	"context"
 	"errors"
 	"strings"
 
@@ -11,11 +12,11 @@ import (
 	"forgejo.org/modules/util"
 	"forgejo.org/services/auth/source/smtp"
 
-	"github.com/urfave/cli/v2"
+	"github.com/urfave/cli/v3"
 )
 
-var (
-	smtpCLIFlags = []cli.Flag{
+func smtpCLIFlags() []cli.Flag {
+	return []cli.Flag{
 		&cli.StringFlag{
 			Name:  "name",
 			Value: "",
@@ -71,23 +72,27 @@ var (
 			Value: true,
 		},
 	}
+}
 
-	microcmdAuthAddSMTP = &cli.Command{
+func microcmdAuthAddSMTP() *cli.Command {
+	return &cli.Command{
 		Name:   "add-smtp",
 		Usage:  "Add new SMTP authentication source",
 		Action: runAddSMTP,
-		Flags:  smtpCLIFlags,
+		Flags:  smtpCLIFlags(),
 	}
+}
 
-	microcmdAuthUpdateSMTP = &cli.Command{
+func microcmdAuthUpdateSMTP() *cli.Command {
+	return &cli.Command{
 		Name:   "update-smtp",
 		Usage:  "Update existing SMTP authentication source",
 		Action: runUpdateSMTP,
-		Flags:  append(smtpCLIFlags[:1], append([]cli.Flag{idFlag}, smtpCLIFlags[1:]...)...),
+		Flags:  append(smtpCLIFlags()[:1], append([]cli.Flag{idFlag()}, smtpCLIFlags()[1:]...)...),
 	}
-)
+}
 
-func parseSMTPConfig(c *cli.Context, conf *smtp.Source) error {
+func parseSMTPConfig(c *cli.Command, conf *smtp.Source) error {
 	if c.IsSet("auth-type") {
 		conf.Auth = c.String("auth-type")
 		validAuthTypes := []string{"PLAIN", "LOGIN", "CRAM-MD5"}
@@ -123,8 +128,8 @@ func parseSMTPConfig(c *cli.Context, conf *smtp.Source) error {
 	return nil
 }
 
-func runAddSMTP(c *cli.Context) error {
-	ctx, cancel := installSignals()
+func runAddSMTP(ctx context.Context, c *cli.Command) error {
+	ctx, cancel := installSignals(ctx)
 	defer cancel()
 
 	if err := initDB(ctx); err != nil {
@@ -163,12 +168,12 @@ func runAddSMTP(c *cli.Context) error {
 	})
 }
 
-func runUpdateSMTP(c *cli.Context) error {
+func runUpdateSMTP(ctx context.Context, c *cli.Command) error {
 	if !c.IsSet("id") {
 		return errors.New("--id flag is missing")
 	}
 
-	ctx, cancel := installSignals()
+	ctx, cancel := installSignals(ctx)
 	defer cancel()
 
 	if err := initDB(ctx); err != nil {