perf: avoid double parsing and extra clones in doc signature formatting

[Fibonacci747]

Summary

This change removes redundant work when formatting documentation signatures. The virtual file is now parsed only once using a local DiagnosticsBuilder, while keeping the same “allow a single parse error” behavior. The helper get_virtual_syntax_file_signature now takes &str instead of String, so we no longer clone signature strings just to intern them for the virtual file. Additionally, collect_green_nodes was simplified to fill a provided vector in place instead of returning a cloned copy, and its call sites were updated accordingly.

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Type of change

Please check one:

• Performance improvement

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Why is this change needed?

These changes reduce unnecessary allocations and parsing overhead without affecting the observable behavior of location links.

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[reviewable-StarkWare]

This change is 

[orizi]

@orizi made 1 comment.
Reviewable status: 0 of 1 files reviewed, 1 unresolved discussion (waiting on @Fibonacci747).

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crates/cairo-lang-doc/src/location_links.rs line 34 at r1 (raw file):

/// Collects all [`cairo_lang_syntax::node::green::GreenNode`]s for a [`SyntaxNode`],
/// returns a vector of their [`SyntaxKind`] and text.
fn collect_green_nodes<'db>(

and fix doc.

Suggestion:

fn extend_green_nodes<'db>(

[Fibonacci747]

@orizi made 1 comment.
Reviewable status: 0 of 1 files reviewed, 1 unresolved discussion (waiting on @Fibonacci747).

crates/cairo-lang-doc/src/location_links.rs line 34 at r1 (raw file):

/// Collects all [`cairo_lang_syntax::node::green::GreenNode`]s for a [`SyntaxNode`],
/// returns a vector of their [`SyntaxKind`] and text.
fn collect_green_nodes<'db>(

and fix doc.

Suggestion:

fn extend_green_nodes<'db>(

fixed

[orizi]

@orizi made 1 comment and resolved 1 discussion.
Reviewable status: 0 of 1 files reviewed, all discussions resolved.

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a discussion (no related file):
@FroyaTheHen