tokmd-analysis-halstead 1.9.0

Halstead analysis for tokmd analysis receipts.
Documentation
# tokmd-analysis-halstead

Halstead metric helpers for tokmd analysis receipts.

## Problem

You need Halstead metrics from source text without pulling the full analysis
pipeline into your caller.

## What it gives you

- `is_halstead_lang`
- `operators_for_lang`
- `FileTokenCounts`
- `tokenize_for_halstead`
- `build_halstead_report`

## Integration notes

- Supports a curated language set only.
- Reads text through `tokmd-content` and caps file sizes through analysis
  limits.
- Produces deterministic aggregate metrics for the shared analysis receipts.

## Go deeper

### Reference

- [Source]src/lib.rs
- [tokmd-content]../tokmd-content/README.md

### Explanation

- [Architecture]../../docs/architecture.md
- [Philosophy]../../docs/explanation.md