Add support for `rankingScoreThreshold`

[Strift]

Description

Allow overriding the rankingScoreThreshold search parameter when making requests.

Basic example

const { searchClient } = instantMeiliSearch(
  process.env.NEXT_PUBLIC_MEILISEARCH_HOST as string,
  process.env.NEXT_PUBLIC_MEILISEARCH_API_KEY,
  {
    primaryKey: 'id',
    meiliSearchParams: {
      rankingScoreThreshold: 0.5
    }
  }
)