Tracking: language support requests (post-1.0 roadmap)

[colbymchenry]

codegraph parses code with tree-sitter, so adding a language is mostly: wire a grammar .wasm + a small per-language extractor, then validate retrieval on real repos. There's an /add-lang workflow and a contributor cookbook (see #97 / docs/ADDING-A-LANGUAGE.md).

This issue consolidates the individual language-support requests so they don't fragment the tracker ahead of 1.0. The individual issues are being closed and folded in here — 👍 a language below to signal demand, and PRs are very welcome (start from the closest existing extractor).

Currently supported: TypeScript/JavaScript, Python, Go, Rust, Java, Kotlin, C/C++, C#, Swift, PHP, Ruby, Objective-C, Lua/Luau, Svelte, Vue, Liquid, Delphi.

Requested (not yet supported):

Language	Issue(s)	Notes
Visual Basic / VB.NET	#639, #170
Erlang	#635
COBOL	#590
BrightScript	#559
ReScript	#524
PLC Structured Text (SCL)	#441
CUDA (.cu / .cuh)	#387	C++ dialect — may largely work by mapping the extensions to the C/C++ extractor
Solidity	#374
Lazarus / Free Pascal	#340	Delphi (.pas / .dfm) is already supported; Lazarus FPC is close — please test current behavior
Nix	#332, #324
HCL / Terraform (.tf)	#310, #83
Verilog / SystemVerilog	#262
Julia	#229
Fortran	#200
Groovy	#169
dbt (Databricks)	#88
SQL	#85
R	#82
ArkTS (.ets)	#512, #396	TS superset — likely works via the TS extractor once .ets is in file discovery; please test
Razor (.cshtml)	#319	Embedded C# + script blocks
Astro (.astro)	#309	Frontmatter + script blocks
HTML / Jinja2 templates	#431	FastAPI server-side rendering
AUTOSAR C/C++ (heavy macros)	#557	More a C/C++ macro-expansion gap than a new grammar

Prioritization will be roughly by 👍 + PR availability. Contributions welcome — this is one of the easiest areas to land a PR.