Release fixes: CLI --version, ALSA on Linux, web build via xtask, xtask version

- effectcraft-cli: support --version/-V/version (the packaging smoke tests call it).
- Linux release job installs libasound2-dev for alsa-sys; deb/rpm depend on
  libasound2/alsa-lib; Flatpak gets --socket=pulseaudio.
- packaging/web/package.sh builds with `cargo xtask web` (wasm-bindgen) and zips
  <target>/web/dist; the release job installs wasm-bindgen-cli 0.2.129.
- xtask: version.rs (ported from PhotoCraft) called helpers that don't exist here,
  so xtask didn't compile; use the local run() and wire up `cargo xtask version`.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packaging/linux/flatpak/ai.storyteller.effectcraft.yml

@@ -19,6 +19,7 @@ finish-args:
   - --share=ipc
   - --socket=wayland
   - --socket=fallback-x11
+  - --socket=pulseaudio
   - --device=dri
   # Open/Save dialogs use the file-chooser portal (rfd), and drag-and-drop uses the document
   # portal, so broad filesystem access isn't needed. Pictures is granted for opening files by

packaging/linux/nfpm.yaml

@@ -32,6 +32,7 @@ overrides:
       - libgcc-s1
       - libxkbcommon0
       - libvulkan1 | libegl1
+      - libasound2 | libasound2t64
     recommends:
       - libwayland-client0
       - libx11-6
@@ -45,6 +46,7 @@ overrides:
     depends:
       - libxkbcommon
       - (vulkan-loader or libglvnd-egl)
+      - alsa-lib
     recommends:
       - libwayland-client
       - libX11