v0.2.0 — Transform, paragraph-scoped checking

v0.2.0 — transform a selection, paragraph-scoped checking, reliability fixes

• Transform: select text, right-click or Alt+Shift+T, rewrite it with a
  free-form instruction; accept as a replacement or an insertion.
• Automatic checks now look only at the paragraph you are working in.
• The status pill sits clear of the text and its x stops the check.
• Pause or resume the extension on a site from the context menu.
• Reliability: the background page is held open while a request is
  outstanding, a failed model load is retried once, and the extension no
  longer dictates a context size to Ollama, so it can share a model with
  other clients.
• Renamed to Local AI Text Assistant.