feat(build): cross-platform desktop packaging; bump to 0.1.0

Adds Docker-based packaging for Linux desktop (deb/rpm), Arch
(.pkg.tar.zst via makepkg), and Windows. Windows cross-compiles from
Linux via the official Tauri path — the x86_64-pc-windows-msvc target
driven by cargo-xwin — and produces an NSIS installer (nsis via
tauri.conf.json targets, since the CLI rejects --bundles nsis on a Linux
host). Verified end to end: builds jellytau.exe + jellytau_x64-setup.exe.

Unifies everything on one registry builder image (Dockerfile.builder):
Android SDK/NDK, rpm/file, clang(+clang-cl)/lld/llvm/nsis, cargo-xwin and
the msvc target. Packaging tools sit in a trailing layer so tool changes
rebuild in ~1min instead of ~15. Desktop stages are thin FROM
${BUILDER_IMAGE} layers; Arch uses a separate archlinux image.

CLAUDE.md: CI must install no system toolchains — everything lives in the
image. Bumps version 0.0.18 -> 0.1.0 (Windows support + webview audio +
equalizer).

TRACES: UR-003, UR-005 | DR-004

package.json

@@ -1,6 +1,6 @@
 {
   "name": "jellytau",
-  "version": "0.0.18",
+  "version": "0.1.0",
   "description": "",
   "type": "module",
   "packageManager": "bun@1.3.5",
@@ -25,6 +25,12 @@
     "android:dev": "./scripts/build-and-deploy.sh",
     "android:check": "./scripts/check-android.sh",
     "android:logs": "./scripts/logcat.sh",
+    "desktop:build:linux": "./scripts/build-desktop-linux.sh",
+    "desktop:build:arch": "./scripts/build-arch.sh",
+    "desktop:build:windows": "./scripts/build-windows-cross.sh",
+    "docker:build:linux": "docker compose run --rm desktop-linux-build",
+    "docker:build:arch": "docker compose run --rm arch-build",
+    "docker:build:windows": "docker compose run --rm windows-cross",
     "clean": "./scripts/clean.sh",
     "tauri": "tauri",
     "traces": "bun run scripts/extract-traces.ts",