feat(handball-api): add Handball API

Implemented:

Add Handball API with limited functionalities

Query competitions (competitions are different leagues without season (e.g. "Bundesliga", "Bundesliga Frauen", etc.))
Query available seasons for competition (season would be "22/23")
Query players in season
Query player profiles
Query timelines of games
Query season summaries
Add unit tests for the Handball API

This commit adds the Handball V2 API with a limited set of functionalities. Unit tests for the API have been implemented as well.

johnwmillr / SportradarAPIs