feat: geolocation control

[RobertOrthofer]

Implemented changes

This PR brings a custom Geolocation-control as defined in #562, that can be used just like any other ol-control. The user has to agree to the location-prompt by the browser, which will only show up when served via https (which is also true for testing, workarounds like ngrok or mkcert will be needed).

The centerWhenReady-prop will pan the view to the user position on the first update of the geolocator.

Rotation is not implemented by default, but the heading-property of the position feature is set, so by setting the style-property of the geolocation control a rotation get be set by accessing that property via style expressions.
(to enable tracking the heading, highAccuracy and trackHeading have to be set).

With trackAccuracy the accuracy feature will be shown in addition to the position feature, indicating possible low accuracy of the sensor.

A custom Icon for the button can be set via the buttonIcon-prop. The button element get be retrieved via Geolocation.getElement()

Checklist before requesting a review

• I have performed a self-review of my code
• I have added a test related to this feature/fix
• For new features: I have created a story showcasing this new feature
• All checks have passed
• The PR title follows conventional commit style and reflects the type of change (major/minor/patch, breaking)
• The PR title describes the change within this element (each merged PR equals one entry in the element's changelog!)

[RobertOrthofer]

There might be a cleaner way for the positioning (css injection?) of the button element. Right now it is assumed that the default zoom-buttons are available, as this is most likely the most common setup.

[silvester-pari]

Looks great!