feat(header): support header title typeit

[DaveA-W]

Change to support optional typeit of header title.

Example at https://www.holo.co.de/ which adds _custom.scss to make the effect more subtle (as well as only lasting for ~10 seconds)

.header-title {

    .ti-cursor {
        animation-iteration-count: 10 !important;
        opacity: 0.3;
        transition: opacity 5s linear 5s;
    }

    span.ti-cursor {
        opacity: 0;
    }
}

[dillonzq]

@DaveA-W Thanks for your PR.
I have added some configurations for TypeIt to change typing speed, blinking speed, cursor character and duration after typing finishing in #314