Release under the SolidCraft name: binaries, assets and installers (#383)

* Release under the SolidCraft name: binaries, assets and installers

The desktop binary is now `solidcraft` and the CLI `solidcraft-cli` (the two app packages
are renamed; their folders move with the rest of the rename later). Every release asset is
named solidcraft-<ver>-… / SolidCraft-<ver>-windows-x64.exe, and the installers show the
SolidCraft product name.

Kept so existing installs keep updating (docs/compatibility.md):
- `solvecraft-cli` alias binary in every package, forwarding to solidcraft-cli with a
  deprecation note on stderr (tests/legacy_alias.rs).
- Linux app ID ai.storyteller.solvecraft (Flatpak ID, desktop entry, Wayland app_id).
- MSI UpgradeCode, so the MSI upgrades in place.
- deb Replaces/Conflicts/Provides and rpm Obsoletes/Provides solvecraft.
- An old-named .zsync copy so earlier AppImages find updates; a legacy .flatpakrepo copy.
- .solvecraft file associations; SOLVECRAFT_* fallbacks in the packaging scripts.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RjGw4gA5ZvKrU8MQP6sBgT

* MSI: register the legacy .solvecraft extension without a duplicate open verb

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RjGw4gA5ZvKrU8MQP6sBgT

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

packaging/linux/AppRun

@@ -3,20 +3,22 @@
 # Adapted from PhotoCraft's AppRun (storytold/photocraft, Apache-2.0; see ATTRIBUTION.md).
 #
 # On Wayland the compositor resolves a window's dock icon by taking the window's
-# app_id (ai.storyteller.solvecraft) and looking up an installed .desktop file.
+# app_id (ai.storyteller.solvecraft, kept as a compatibility shim) and looking up an installed .desktop file.
 # An AppImage installs nothing, so every AppImage run would otherwise show the
 # generic "Wayland" icon. Best-effort desktop integration: on first run
 # (and whenever the AppImage's path changes) install the .desktop entry and the
 # hicolor icons into $XDG_DATA_HOME, then launch. Every failure here must leave
-# the launch untouched. Opt out with SOLVECRAFT_NO_DESKTOP_INTEGRATION=1.
+# the launch untouched. Opt out with SOLIDCRAFT_NO_DESKTOP_INTEGRATION=1 (the pre-rename
+# SOLVECRAFT_NO_DESKTOP_INTEGRATION still works: compatibility shim, docs/compatibility.md).
 
 set -u
 
 APPDIR="$(dirname "$(readlink -f "$0")")"
+# Compatibility shim (docs/compatibility.md): the pre-rename reverse-DNS id.
 DESK_ID=ai.storyteller.solvecraft
 
 integrate() {
-  case "${SOLVECRAFT_NO_DESKTOP_INTEGRATION:-}" in
+  case "${SOLIDCRAFT_NO_DESKTOP_INTEGRATION:-${SOLVECRAFT_NO_DESKTOP_INTEGRATION:-}}" in
     1 | true | yes) return 0 ;;
   esac
   # The AppImage runtime exports $APPIMAGE; without it (an extracted AppDir) there
@@ -70,4 +72,4 @@ integrate() {
 }
 
 integrate
-exec "$APPDIR/usr/bin/solvecraft" "$@"
+exec "$APPDIR/usr/bin/solidcraft" "$@"