feat: Add Kotlin Language Support

[p0thi]

TL;DR

This PR introduces full support for the Kotlin programming language, making it the 8th supported language for repository analysis.

Description

This pull request integrates a new tree-sitter-based analyzer for Kotlin (.kt, .kts files). The goal is to provide feature-parity with the existing Java analyzer, enabling CodeWiki to generate comprehensive documentation for Kotlin-based projects.

Key Changes:

• New Kotlin Analyzer (kotlin.py): A new analyzer capable of parsing Kotlin source code to extract nodes and relationships. It handles:

  • Component Extraction: Classes, interfaces, objects, data classes, enums, and functions.
  • Relationship Mapping: Inheritance, interface implementations, property types, constructor parameters, method calls, and object instantiations.
  • Advanced Type Resolution: Infers variable types from local declarations, function parameters, and class properties.

• Core System Integration: The new analyzer is wired into the entire CodeWiki pipeline:

  • File Discovery & Validation: The CLI now recognizes .kt and .kts files as valid source files.
  • Analysis Service: The central analysis service can now dispatch jobs to the Kotlin analyzer.
  • Call Graph & Prompt Generation: Kotlin components are correctly represented in the call graph and included in prompts for the LLM.

• Dependency Updates:

  • Added the tree-sitter-kotlin dependency to pyproject.toml and requirements.txt.

By adding Kotlin, CodeWiki significantly broadens its applicability to a large and modern segment of the JVM ecosystem.