v0.2.2

A cleaner viewer, a working library out of the box, and fixes from the first
weeks of use.

Viewer

• A floating hierarchy. It sits on the canvas as a card and folds from its
  own header. When folded, a single icon at the top left reopens it. The
  header keeps only the views: Diagram, 3D, BOM and Pair.
• Harnesses & links. The hierarchy groups a level's cables, harnesses and
  fastener stacks. Clicking one selects it and frames all of its lines, and
  so does a check's Locate in viewer.
• Easier to open. The project card in the Protoboard side bar has an
  Open button, and opening a module from Protoboard shows it in the
  viewer.
• A loading screen with the Protoboard mark while a project loads.
• An empty module offers "Add a part", which opens the library.
• The legend sits at the bottom right. It folds to a tab, and each
  colour says what it means.
• Menus and tooltips: menus have icons and keyboard shortcuts, and
  tooltips are short labels.
• The Inspector cuts long descriptions to five lines and shows long
  lists ten at a time. It lists every interface of a part, and its pin
  mapping fits a narrow panel.
• Fonts: Kode Mono throughout under the Protoboard themes. Under any
  other theme, only the Protoboard name uses it.

Library and account

• The library works in every project. A project that names no service
  now uses the hosted Protoboard library.
• Sign-in says plainly when the service can't be reached.
• Manage Account opens your account page from VS Code, and
  protoboard account does the same from the command line.
• Part pages name each vendor's terms.
• parts add skips files the library doesn't redistribute.

Extension

• Help in the Protoboard side bar has Documentation, Feedback and
  Issues, and the Discord community.
• A shorter trust prompt before a project's code runs.
• Settings groups its commands under More actions.

Fixes

• Windows: protoboard upgrade and protoboard stack link no longer
  fail with "Path is a directory" when moving a project to a new stack. An
  upgrade that can't finish leaves the project as it was.
• The protoboard command outside VS Code runs upgrade with its own,
  newer version.
• For agents: clearer run logs and loader messages, theme aliases, and
  supplier comparison in sourcing.

Every package and the extension move to 0.2.2 together, with
@deltarobotics/uhd-viewer 0.2.1. A 0.2.x project needs no change.