Paste 0.1.0 Linux package

This package is a distro-neutral launcher for the Paste production link:
  pear://u6oyh38gcn3ouk6wnzpoetzpeg7gs1w5s9f5aw5quocr1eubsoiy

Requirements:
  - Pear runtime installed and on PATH
  - Linux x64 or arm64 with the matching sodium-native prebuild

Install:
  1. Put bin/pearpaste on PATH.
  2. Optionally install share/applications/pearpaste.desktop.
  3. Run: pearpaste

The Pear P2P update path remains intact: app content updates flow through the
pear:// link, so this launcher rarely needs to be rebuilt.
