feat/add function resolver support

[abhisek]

• feat: Add support for function resolvers
• feat: Add support for function resolvers

[codecov-commenter]

Codecov Report

❌ Patch coverage is 62.02805% with 352 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.88%. Comparing base (2d32b8d) to head (cd63a55).

Files with missing lines	Patch %	Lines
lang/javascript_resolvers.go	64.52%	83 Missing and 22 partials ⚠️
core/ast/function_decl.go	0.00%	75 Missing ⚠️
lang/java_resolvers.go	69.08%	50 Missing and 14 partials ⚠️
lang/go_resolvers.go	68.94%	39 Missing and 20 partials ⚠️
lang/python_resolvers.go	79.13%	20 Missing and 9 partials ⚠️
core/ast/node.go	0.00%	20 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #40      +/-   ##
==========================================
+ Coverage   56.84%   57.88%   +1.04%     
==========================================
  Files          46       47       +1     
  Lines        3661     4578     +917     
==========================================
+ Hits         2081     2650     +569     
- Misses       1421     1705     +284     
- Partials      159      223      +64     

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[Copilot]

Pull Request Overview

This PR adds comprehensive function resolver support to the codebase, enabling the parsing and extraction of function declarations from multiple programming languages including Python, JavaScript, Java, and Go. The implementation introduces a unified FunctionDeclarationNode AST representation and language-specific resolvers that leverage Tree-Sitter queries to extract function metadata.

Key changes:

• Adds ResolveFunctions method to the LanguageResolvers interface
• Implements function resolvers for Python, JavaScript, Java, and Go languages
• Creates comprehensive test fixtures and test cases for each language
• Introduces enhanced AST node structure with position tracking capabilities

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
core/language.go	Adds ResolveFunctions method to LanguageResolvers interface
core/ast/function_decl.go	Comprehensive FunctionDeclarationNode implementation with metadata support
core/ast/node.go	Adds node position tracking utilities
lang/python_resolvers.go	Python-specific function resolver implementation with Tree-Sitter queries
lang/javascript_resolvers.go	JavaScript function resolver supporting various function types
lang/java_resolvers.go	Java function resolver with access modifier and annotation support
lang/go_resolvers.go	Go function resolver with method and receiver type extraction
Test files	Comprehensive test suites for all language resolvers
Fixture files	Test data for Python, JavaScript, Java, and Go function parsing
docs/grammar.md	Documentation linking to Tree-Sitter grammar references

Comments suppressed due to low confidence (3)

lang/go_resolvers_test.go:94

• The variable name 'l' is ambiguous and not used. Consider removing this line or renaming the variable to be more descriptive like 'goLanguage' to match the pattern used elsewhere in the test.

		l, err := lang.NewGoLanguage()