feat: add support for parsing, inspecting and autocompleting in a project stage written using Spring Data MongoDB INTELLIJ-173

[himanshusinghs]

Description

Adds support for parsing, inspecting and autocompleting field names in a project stage written using Aggregation.project(), chained ProjectionOptions calls (only andInclude and andExclude) and their variants:

• Aggregation.project("field")
• Aggregation.project(Fields.fields("field"))
• Aggregation.project(Fields.from(Fields.field("field")))
• Aggregation.project().andInclude("field")
• Aggregation.project().andInclude(Fields.fields("field"))
• Aggregation.project().andInclude(Fields.from(Fields.field("field")))
• Aggregation.project().andExclude("field")

Checklist

• New tests and/or benchmarks are included.
• Documentation is changed or added.
• Changelog is updated accordingly.
• I have signed the MongoDB Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement).

Open Questions

This PR splits the current aggregation parsing logic into dedicated

stage based parsers.

[github-actions]

Coverage Report

Overall Project	78.84% -0.15%	✅
Files changed	91.54%	✅

File	Coverage
MatchStageParser.kt	98.18%	✅
ProjectStageParser.kt	92.03% -7.97%	✅
AggregationStagesParser.kt	89.24% -4.43%	✅
SpringCriteriaDialectParser.kt	88.54% -0.15%	✅

[github-actions]

🤖 Benchmark Comparison for Merge remote-tracking branch 'origin/main' into feat/INTELLIJ-173-spring-project

Benchmark	Previous	Current	Change
com.mongodb.jbplugin.jmh.SampleBenchmark.init	2,619,840,805.24 ops/s	2,619,470,537.38 ops/s	-0.01%

[github-actions]

🤖 Benchmark Comparison for chore: added tests for field existence inspection

Benchmark	Previous	Current	Change
com.mongodb.jbplugin.jmh.SampleBenchmark.init	2,619,840,805.24 ops/s	2,619,201,800.09 ops/s	-0.02%

[github-actions]

🤖 Benchmark Comparison for feat: AC support in project and chained calls

Benchmark	Previous	Current	Change
com.mongodb.jbplugin.jmh.SampleBenchmark.init	2,619,840,805.24 ops/s	2,665,052,092.73 ops/s	1.73%

[github-actions]

🤖 Benchmark Comparison for chore: add CHANGELOG entry

Benchmark	Previous	Current	Change
com.mongodb.jbplugin.jmh.SampleBenchmark.init	2,619,840,805.24 ops/s	2,664,210,723.46 ops/s	1.69%

[github-actions]

🤖 Benchmark Comparison for chore: minor refactors

Benchmark	Previous	Current	Change
com.mongodb.jbplugin.jmh.SampleBenchmark.init	2,619,840,805.24 ops/s	2,662,718,456.75 ops/s	1.64%