Asale client v0.2.0

Installers for all three platforms, built by the release workflow.

Before publishing, confirm:

• the macOS .dmg is signed and notarized (otherwise other machines report it as damaged)
• the Windows installer is Authenticode-signed — the build asserts this when the
  Azure credentials are configured, but on a fresh Windows machine also check that
  Get-AuthenticodeSignature reports Valid and that SmartScreen stays quiet
  (a brand-new certificate has no reputation yet and can still warn for a while)
• every bundle has a matching .sig next to it (required for auto-update)
• install once and verify login and going on the market, then publish manually