Add initial bitOr tests (29 total)

[erasedbird]

I've added some test cases here, let me know if I'm missing anything major or should reorganize. Main ones are:

• basic core tests on int lists and empty array
• input forms which covers field paths and nested tests
• non numeric inputs, which also has non int errors
• null
• long return type

Closes issue #204

[documentdb-triage-tool]

🤖 Auto-triaged by documentdb-triage-tool.

Applied: compatibility test, enhancement
Project fields suggested: Component test-coverage · Priority P2 · Effort L · Status Needs Review
Confidence: 0.85 (mixed)

Reasoning

component from path globs (test-coverage); effort from diff stats (353+0 LOC, 6 files); LLM: Adds 29 new test cases for the bitOr operator, expanding compatibility test coverage across multiple input scenarios.

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