feat: Add support for DevOps languages (Terraform/HCL and Helm Charts)

[dniald]

I am using code-review-graph to provide context for AI assistants (Claude Code/Cursor) in a DevOps-heavy environment. While the tool is excellent for application code (Python, Go, TS), it currently lacks structural parsing for Infrastructure-as-Code (IaC) files like Terraform (.tf, .hcl) and Helm Charts.

I would like to see code-review-graph support structural mapping for:
Terraform (HCL): Identifying resource blocks, modules, and variable dependencies so the AI understands the "blast radius" of infrastructure changes.
Helm Charts (YAML/Go Templates): Mapping the relationship between values.yaml and template files.

Additional context:
Since this tool already uses Tree-sitter, these languages have mature grammars available:
tree-sitter-hcl
tree-sitter-yaml

Adding these would make this the go-to tool for DevOps engineers using AI.

[tirth8205]

Great feature request! Terraform/HCL and Helm Charts would be valuable additions for DevOps-heavy workflows. Both have mature tree-sitter grammars (tree-sitter-hcl and tree-sitter-yaml) available in the tree-sitter-language-pack that this project already uses.

For Terraform/HCL specifically, the key constructs to extract would be: resource blocks, module blocks, variable declarations, data sources, and output blocks — enabling blast-radius analysis for infrastructure changes.

This is a valid enhancement. A PR adding .tf/.hcl extension support with tree-sitter-hcl would be welcomed. If you'd like to contribute, the pattern to follow is in parser.py — add the extension mapping, define node types for classes/functions/imports, and add test fixtures.