herdr web ui v0.3.22

Added

• A one-line installer: curl -fsSL https://devswha.github.io/herdr-web-ui/install.sh | sh
  installs what is missing (herdr, Bun, Node 22, for the user only and without sudo), installs the
  herdr plugin and starts it when herdr runs. When Tailscale runs on the PC, it serves the app to
  the tailnet on the first free HTTPS port, says how to undo that, and prints the address a phone
  opens as a QR code. Running it again keeps what is there and prints the address again.
• bun scripts/plugin.ts phone, the installer's last step, for a plugin installed without it.

Changed

• Through a proxy on a PC whose Tailscale login is known, as with tailscale serve, a request
  with no login (a tagged device) needs pairing, even before the first device is paired.
• The plugin starts the server with ~/.bun/bin, ~/.local/bin and the installer's Node appended
  to herdr's PATH, so a herdr started from a shell without them still runs terminals.