feat(parser): add tuple-binding shorthands

[Seddryck]

Parse f~ and ~f as distinct tuple-binding shorthand syntax in pipelines and nested expressions. Preserve function identity, prefix/postfix direction, authored text, and individual name/tilde spans through TupleBindingShorthandSyntax; leave function eligibility and runtime lowering downstream.

A stateless scanner enforces adjacency even around named comment extras. Add syntax documentation, highlighting, malformed-input recovery coverage, Unicode span checks, and incremental-edit tests. Update three existing malformed-input recovery snapshots for the new parser states.

Validation:

• npm run generate: generated artifacts are reproducible.
• npm test: 366 grammar cases and 5 Node tests passed.
• dotnet test Expressif.Syntax.sln: 475 tests passed on each of .NET 8, 9, and 10.
• Native Node binding built with MSBuild using ImportDirectoryBuildProps=false and ImportDirectoryBuildTargets=false to exclude the repository's .NET-only properties.
• git diff --check: passed.

close #150

[coderabbitai]

Important

• 🔍 Trigger review

This repository does not receive automatic reviews because it has fewer than 10 stars.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 9759039f-ae39-46a8-8231-0b21b062f273

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}