Add a placeholder step in the build-release workflow to download and
package FreeRDP3 DLLs (libfreerdp3.dll, libwinpr3.dll,
libfreerdp-client3.dll) alongside wraith.exe. The step is currently
commented out pending a reliable DLL source URL; the app gracefully
falls back to MockBackend when the DLLs are absent.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add Gitea Actions workflow that builds wraith.exe for Windows amd64,
signs it with an Azure Key Vault certificate via jsign, and uploads
the signed binary with a version.json manifest.
Also adds a `version` var to main.go for -ldflags injection at build time.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
