V2

[Spamercz]

This pull request adds a comprehensive set of new aggregation classes to the Spameri\ElasticQuery\Aggregation namespace, significantly expanding support for various Elasticsearch aggregation types. Each class encapsulates the logic for a specific aggregation, allowing for easier construction and serialization of Elasticsearch queries.

The most important changes are:

New Metric and Bucket Aggregations:

• Added AvgBucket, BoxPlot, Cardinality, ExtendedStats, GeoBounds, GeoCentroid, and GeoHashGrid classes to support a range of metric aggregations such as averages, statistical summaries, and geospatial metrics. [1] [2] [3] [4] [5] [6] [7]
• Added AdjacencyMatrix, Composite, DateHistogram, DateRange, DiversifiedSampler, and GeoDistance classes to implement various bucket and multi-bucket aggregations, including support for range and geospatial bucketing. [1] [2] [3] [4] [5] [6]

New Pipeline Aggregations:

• Implemented pipeline aggregation classes: BucketScript, BucketSelector, BucketSort, CumulativeSum, and Derivative, enabling advanced data processing and transformations on aggregation results. [1] [2] [3] [4] [5]

Constructor and Serialization Logic:

• Each class provides a constructor for setting aggregation parameters and a toArray() method for serializing the aggregation to the appropriate Elasticsearch query format. (All references above)

These additions make it much easier to build complex and varied Elasticsearch queries using the library, covering a wide array of use cases.