v0.15.1

Documentation

• Per-command reference docs split out of the main README into docs/commands/. New pages: validate.md, diff.md, whatif.md, statediff.md, tracked-attributes.md, export.md, plus a docs/commands/README.md index. Each page is self-contained: when-to-use, usage, worked examples, what-it-catches / what-it-doesn't, output formats, related links. The main README's Commands table now points at each page rather than carrying the long-form content inline (480 lines moved out of the README; it shrinks from 721 to 258 lines and becomes a navigation hub). Anchor references inside the surviving README content (Module resolution, Static evaluation surface) are unchanged so deep links still work.
• New docs/getting-started.md — a 5-minute walkthrough that creates a sample module from scratch and exercises validate / diff / # tflens:track / statediff / the GitHub Action in sequence. Each section ends with a link to the corresponding command reference page.