feat: user v2alpha email API (#5708)

* chore(proto): update versions

* change protoc plugin

* some cleanups

* define api for setting emails in new api

* implement user.SetEmail

* move SetEmail buisiness logic into command

* resuse newCryptoCode

* command: add ChangeEmail unit tests

Not complete, was not able to mock the generator.

* Revert "resuse newCryptoCode"

This reverts commit c89e90ae35.

* undo change to crypto code generators

* command: use a generator so we can test properly

* command: reorganise ChangeEmail

improve test coverage

* implement VerifyEmail

including unit tests

* add URL template tests

* proto: change context to object

* remove old auth option

* remove old auth option

* fix linting errors

run gci on modified files

* add permission checks and fix some errors

* comments

* comments

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>
Co-authored-by: Tim Möhlmann <tim+github@zitadel.com>

internal/command/user_human.go

@@ -507,7 +507,7 @@ func (c *Commands) createHuman(ctx context.Context, orgID string, human *domain.
 		if human.Email != nil && human.EmailAddress != "" && human.IsEmailVerified {
 			events = append(events, user.NewHumanEmailVerifiedEvent(ctx, userAgg))
 		} else {
-			emailCode, err := domain.NewEmailCode(emailCodeGenerator)
+			emailCode, _, err := domain.NewEmailCode(emailCodeGenerator)
 			if err != nil {
 				return nil, nil, err
 			}