v0.5.2

The first community fix, and the README brought up to date with the panel.

Fixed

• The prompt box grows with wrapped lines as well as newlines, up to ten
  rows, and scrolls inside past that; a long single line no longer hides
  behind a one-row box (#4, reported by dhaw97160).
• The e2e suite's teardown on Windows no longer fails when the fake CLI's
  executable is still held for a moment after its process has exited: the
  temporary folders are removed with retries, and one that still cannot go
  is reported and left to the OS rather than failing a green suite.

Changed

• The README describes the panel as it is at 0.5.x: the Open diff and
  Revert buttons it still promised are gone since 0.4.2 (the diff editor is
  behind Click to expand, revert is the rewind menu), subagents and the
  Agent map, reply and quote with context, question cards, outputs opening
  in the editor and the usage insights are in the highlights, the release
  workflow's own Marketplace publish replaces the by-hand recipe, the live
  drill's budget and measurements are current, and the three upstream Muse
  Code issues are linked from Troubleshooting. Its eleven screenshots are
  rendered from the shipped panel by the UI harness (npm run harness:shots) and say so; the 0.1.1 captures are gone.