release 1.0.1: update from Gitea, Linux-only CLI, desktop app for Linux and Windows

The updater reads the latest release from Gitea. update::apply refuses to
overwrite anything but the CLI. Release workflow builds the Linux CLI;
scripts/build-gui.sh builds the Linux and Windows desktop app. Docs say Linux
and Windows only.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitignore

@@ -18,3 +18,7 @@ apps/gui/src-tauri/target
 CLAUDE.md
 AGENTS.md
 GEMINI.md
+
+# Pacotes gerados por scripts/package-cli.sh
+/sabia-v*
+/dist-gui