Feat: add support for overrides / curation

[phiHero]

Change Summary

Create or update an override

let schema = SearchOverrideSchema<MetadataType>(
    rule: SearchOverrideRule(tags: ["test"], query: "apple", match: SearchOverrideRule.Match.exact, filterBy: "employees:=50"),
    includes: [SearchOverrideInclude(_id: "include-id", position: 1)],
    excludes: [SearchOverrideExclude(_id: "exclude-id")],
    filterBy: "test:=true",
    removeMatchedTokens: false,
    metadata: MetadataType(message: "test-json"),
    sortBy: "num_employees:desc",
    replaceQuery: "test",
    filterCuratedHits: false,
    effectiveFromTs: 123,
    effectiveToTs: 456,
    stopProcessing: false
)
let (data, response) = try await client.collection(name: "books").overrides().upsert(overrideId: "test-id", params: schema)

Retrieve all overrides

let (data, response) = try await client.collection(name: "books").overrides().retrieve(metadataType: Never.self )

Retrieve an override

let (data, response) = try await client.collection(name: "books").override("test-id").retrieve(metadataType: MetadataType.self )

Delete an override

let (data, response) = try await client.collection(name: "books").override("test-id").delete()

PR Checklist

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