API-Token support

Genesys supports API-Token authentication. This ticket is to add support for API Token auth to Embedded Genesys.

Config update

Like we have clientId and clientSecret we can have apiToken:

{
 apiToken: "asdasdxcas"
}

The apiToken is optional, but when it is defined, it has priority over clientId/secret. There is no need to obtain a token and store it in the browser.

serviceAxios configuration needs updating to use Authorization: API-Token asdas... instead of Bearer token when apiToken is provided.

Installer

Update installer to also prompt for API Token. Include a note saying:

API Token will be required in 2025! Please request your token by contacting helpdesk@genesys-pgr.org and include the link to your website where Embedded Genesys is deployed.

The link to helpdesk email should have href="mailto:helpdesk@genesys-pgr.org?subject=API-Token for..... and it should follow the similar logic as existing email href where we generate the message subject and body.