test(cosmosdb): add test SQL examples for all 13 feature areas

Covers: SELECT TOP, WHERE operators (!=, IN, BETWEEN, _ts fields),
functions in SELECT, ORDER BY, aggregation, GROUP BY, string/math/
type-check functions, DISTINCT VALUE, VALUE keyword, OFFSET LIMIT,
geospatial with JSON objects, and NOT EQUAL.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: h3n4l

cosmosdb/examples/aggregation.sql

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+SELECT COUNT(1) AS totalRecords FROM c

cosmosdb/examples/between_expression.sql

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+SELECT * FROM c WHERE c.population BETWEEN 100000 AND 5000000

cosmosdb/examples/distinct_value.sql

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+SELECT DISTINCT VALUE c.countryRegion FROM c

cosmosdb/examples/geospatial.sql

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+SELECT c.name, ST_DISTANCE(c.location, {"type": "Point", "coordinates": [55.2708, 25.2048]}) AS distFromDubaiInMeters FROM c

cosmosdb/examples/group_by.sql

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+SELECT c.country, COUNT(1) AS cityCount FROM c GROUP BY c.country

cosmosdb/examples/in_expression.sql

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+SELECT * FROM c WHERE c.country IN ("US", "UK", "CA")

cosmosdb/examples/math_functions.sql

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+SELECT c.name, ROUND(StringToNumber(c.latitude)) AS lat FROM c

cosmosdb/examples/not_equal.sql

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+SELECT * FROM c WHERE c.status != "inactive"

cosmosdb/examples/offset_limit.sql

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+SELECT * FROM c ORDER BY c.name OFFSET 0 LIMIT 10

cosmosdb/examples/order_by.sql

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+SELECT c.name, c.population FROM c ORDER BY c.population DESC