feat: invite user link (#8578)

# Which Problems Are Solved

As an administrator I want to be able to invite users to my application
with the API V2, some user data I will already prefil, the user should
add the authentication method themself (password, passkey, sso).

# How the Problems Are Solved

- A user can now be created with a email explicitly set to false.
- If a user has no verified email and no authentication method, an
`InviteCode` can be created through the User V2 API.
  - the code can be returned or sent through email
- additionally `URLTemplate` and an `ApplicatioName` can provided for
the email
- The code can be resent and verified through the User V2 API
- The V1 login allows users to verify and resend the code and set a
password (analog user initialization)
- The message text for the user invitation can be customized

# Additional Changes

- `verifyUserPasskeyCode` directly uses `crypto.VerifyCode` (instead of
`verifyEncryptedCode`)
- `verifyEncryptedCode` is removed (unnecessarily queried for the code
generator)

# Additional Context

- closes #8310
- TODO: login V2 will have to implement invite flow:
https://github.com/zitadel/typescript/issues/166

internal/command/user.go

@@ -388,6 +388,10 @@ func (c *Commands) newUserInitCode(ctx context.Context, filter preparation.Filte
 	return c.newEncryptedCode(ctx, filter, domain.SecretGeneratorTypeInitCode, alg)
 }
 
+func (c *Commands) newUserInviteCode(ctx context.Context, filter preparation.FilterToQueryReducer, alg crypto.EncryptionAlgorithm) (*EncryptedCode, error) {
+	return c.newEncryptedCodeWithDefault(ctx, filter, domain.SecretGeneratorTypeInviteCode, alg, c.defaultSecretGenerators.InviteCode)
+}
+
 func userWriteModelByID(ctx context.Context, filter preparation.FilterToQueryReducer, userID, resourceOwner string) (*UserWriteModel, error) {
 	user := NewUserWriteModel(userID, resourceOwner)
 	events, err := filter(ctx, user.Query())