Aggregation stages

Which part of Aggregation stages TeselaDB supports and which elements behave differently from MongoDB.

Elements

Element	Status	Difference
`$addFields`	Yes
`$set`	Yes
`$bucket`	Yes
`$bucketAuto`	Yes
`$count`	Yes
`$densify`	Yes
`$documents`	Yes
`$facet`	Yes
`$fill`	Yes
`$geoNear`	Yes
`$graphLookup`	Yes
`$group`	Yes
`$limit`	Yes
`$lookup`	Yes
`$match`	Yes
`$merge`	Yes
`$out`	Yes
`$project`	Yes
`$redact`	Yes
`$replaceRoot`	Yes
`$replaceWith`	Yes
`$sample`	Yes
`$setWindowFields`	Yes
`$skip`	Yes
`$sort`	Yes
`$sortByCount`	Yes
`$unionWith`	Yes
`$unset`	Yes
`$unwind`	Yes
`$changeStream`	Yes
`$changeStreamSplitLargeEvent`	Yes
`$rankFusion`	Yes
`$scoreFusion`	Yes
`$score`	Yes
`$search`	Yes
`$searchMeta`	Yes
`$vectorSearch`	Yes
`$collStats`	Yes
`$currentOp`	Yes
`$indexStats`	Yes
`$listClusterCatalog`	Yes
`$listLocalSessions`	Yes
`$listSampledQueries`	Yes
`$listSearchIndexes`	Yes
`$listSessions`	Yes
`$planCacheStats`	Yes
`$querySettings`	Yes
`$queryStats`	Yes
`$shardedDataDistribution`	Yes