docs: Tests for prefix scan

[aleksanderkatan]

Changes:

• replace old test example with a new one.

There is no resolve test because it times out, and the number of called resolves is really uncertain.

[github-actions]

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[Copilot]

Pull Request Overview

This PR replaces an old concurrent scan test example with comprehensive prefix scan tests. The changes introduce a new test suite that validates both scan and prefix scan operations with various edge cases and data sizes.

Key changes:

• Complete replacement of the concurrent scan test with a comprehensive prefix scan test suite
• Export of BinaryOp type from the prefix scan module
• New helper functions for JavaScript-based reference implementations

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/typegpu-concurrent-scan/src/prefixScan.ts	Exports BinaryOp type for external use
apps/typegpu-docs/src/examples/tests/prefix-scan/meta.json	Updates test title from "Concurrent Scan Test" to "Prefix Scan Tests"
apps/typegpu-docs/src/examples/tests/prefix-scan/index.ts	Adds comprehensive test suite with multiple test cases for scan and prefix scan operations
apps/typegpu-docs/src/examples/tests/prefix-scan/index.html	Provides minimal HTML for test result display
apps/typegpu-docs/src/examples/tests/prefix-scan/functions.ts	Implements helper functions including binary operations and JavaScript reference implementations
apps/typegpu-docs/src/examples/tests/concurrent-scan/index.ts	Removes old concurrent scan test implementation
apps/typegpu-docs/src/examples/tests/concurrent-scan/index.html	Removes old HTML for concurrent scan test

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[reczkok]

Very elegant! Great work

[cieplypolar]

Great work 🎰 1 nit though, I would love to see shellless functions in ./functions.ts, but in order to do that base branch needs to be updated.

EDIT1:
Wait with merging I want to add vector and matrix tests :)

EDIT2:
Nevermind, BinaryOp signature won't allow me.

[cieplypolar]

There exists round function in std 😉

[lursz]

Great work!