feat: add array declaration parsing support

[Bappoz]

This pull request adds support for parsing array types in both global and local variable declarations, including multidimensional arrays and arrays without specified sizes. It introduces a new helper function to handle array suffixes in type declarations, updates the parsing logic to use this function, and adds comprehensive tests to ensure correct parsing of various array scenarios.

Parser enhancements for array types:

• Added the parse_array_suffix function in types.rs to consume array suffixes ([N]) after variable names, supporting multiple dimensions and arrays without specified sizes. The parsed type is wrapped in Type::Array, though the size is not stored in the AST.
• Updated both global (top_level.rs) and local (var_decl.rs) variable declaration parsers to use parse_array_suffix, enabling consistent array type handling across declaration contexts.

API and module changes:

• Re-exported parse_array_suffix from the types module for use in other parser components.

• Updated imports in affected files to include parse_array_suffix.
  Testing improvements:

• Added new tests to parser_test.rs covering global and local array declarations, multidimensional arrays, and arrays without a specified size to verify correct parsing behavior.

Closes #108

[Copilot]

Pull request overview

Adds parsing support for C-style array declarators ([...]) in both global and local variable declarations by consuming bracket suffixes after identifiers and wrapping the declared type in Type::Array.

Changes:

• Introduces parse_array_suffix to parse one-or-more array suffixes ([expr?]) after a variable name (including multidimensional and []).
• Updates global (parse_global_var_decl) and local (parse_var_decl) declaration parsing to apply parse_array_suffix before optional initializers.
• Adds parser tests covering global/local arrays, multidimensional arrays, and arrays without a specified size.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/parser/rules/declarations/types.rs	Adds parse_array_suffix helper that consumes [...] and nests Type::Array.
src/parser/rules/declarations/top_level.rs	Applies array-suffix parsing to global variable declarations.
src/parser/rules/declarations/var_decl.rs	Applies array-suffix parsing to local variable declarations.
src/parser/rules/declarations/mod.rs	Re-exports parse_array_suffix for use by other parser modules.
src/tests/parser_test.rs	Adds unit tests for global/local array declarations, multidimensional arrays, and [].

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[Bappoz]

Correções do copilot levadas em consideração! pronto para o merge