Function getStartingCluesUsable

getStartingCluesUsable(
    endGameLength: number,
    deckSize: number,
    variant: Variant,
): number
This is used as the denominator of an efficiency calculation:
```
(8 + floor((starting pace + number of suits - unusable clues) * clues per discard))
```
Parameters
- endGameLength: number
- deckSize: number
- variant: Variant
Returns number
See
https://github.com/hanabi/hanabi.github.io/blob/main/misc/efficiency.md
- Defined in packages/game/src/rules/stats.ts:421