Correctly format array type specifier

[lu-zero]

I hate that SQL Server has [ as string delimiter.

[Copilot]

Pull Request Overview

This PR refactors SQL type specifier handling by replacing the specific DoubleColon token type with a more generic TypeSpecifier type that can handle both :: and [] syntax. The change addresses SQL Server's use of [ as a string delimiter by properly recognizing array type specifiers in different SQL dialects.

• Replaces DoubleColon token type with TypeSpecifier to handle both :: and [] syntax
• Implements context-aware parsing that only recognizes type specifiers after valid tokens
• Updates minimum Rust version from 1.65 to 1.84 and uses newer Rust APIs

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/tokenizer.rs	Replaces DoubleColon with TypeSpecifier token and adds context-aware parsing logic
src/formatter.rs	Updates formatter to handle new TypeSpecifier token type and modernizes API usage
src/params.rs	Minor modernization using is_some_and method
src/lib.rs	Adds test case for type specifier formatting
Cargo.toml	Updates minimum Rust version to 1.84
.github/workflows/sqlformat.yml	Updates CI configuration for new Rust version

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