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 <[email protected]>
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 <[email protected]>
Claude-Session: https://claude.ai/code/session_01RjGw4gA5ZvKrU8MQP6sBgT

---------

Co-authored-by: Claude Opus 5.5 <[email protected]>

packaging/env.sh

@@ -4,9 +4,12 @@
 #
 # Exports:
 #   ROOT                    workspace root
-#   VERSION                 [workspace.package] version from Cargo.toml (override: SOLVECRAFT_VERSION)
+#   VERSION                 [workspace.package] version from Cargo.toml (override: SOLIDCRAFT_VERSION)
+#
+# Every SOLIDCRAFT_* override also accepts the pre-rename SOLVECRAFT_* name when the new one is
+# unset (compatibility shim, see docs/compatibility.md).
 #   DIST                    output directory for release artifacts (default: $ROOT/dist/release)
-#   SOLVECRAFT_BUILD_DATE   UTC build date, YYYY-MM-DD
+#   SOLIDCRAFT_BUILD_DATE   UTC build date, YYYY-MM-DD
 #   CARGO_TARGET_DIR        cargo's target dir (default: $ROOT/target)
 
 ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
@@ -20,7 +23,7 @@ workspace_version() {
   ' "$ROOT/Cargo.toml"
 }
 
-VERSION="${SOLVECRAFT_VERSION:-$(workspace_version)}"
+VERSION="${SOLIDCRAFT_VERSION:-${SOLVECRAFT_VERSION:-$(workspace_version)}}"
 if [ -z "$VERSION" ]; then
   echo "error: could not read [workspace.package] version from $ROOT/Cargo.toml" >&2
   exit 1
@@ -32,8 +35,11 @@ mkdir -p "$DIST"
 DIST="$(cd "$DIST" && pwd)"
 export DIST
 
-export SOLVECRAFT_BUILD_DATE="${SOLVECRAFT_BUILD_DATE:-$(date -u +%Y-%m-%d)}"
+export SOLIDCRAFT_BUILD_DATE="${SOLIDCRAFT_BUILD_DATE:-${SOLVECRAFT_BUILD_DATE:-$(date -u +%Y-%m-%d)}}"
 export CARGO_TARGET_DIR="${CARGO_TARGET_DIR:-$ROOT/target}"
+# Compatibility shim, see docs/compatibility.md: the reverse-DNS id (Flatpak app id, desktop,
+# metainfo and MIME file names, icon name, Wayland app_id) keeps its pre-rename value so Flatpak
+# installs keep updating and desktop integration keeps working.
 APP_ID=ai.storyteller.solvecraft
 export APP_ID
 
@@ -43,7 +49,7 @@ warn() {
 }
 
 # Copy the licence, notice and readme files into a package directory. The programs also carry
-# them (Help > About > Licences, `solvecraft-cli licences`).
+# them (Help > About > Licences, `solidcraft-cli licences`).
 copy_docs() {
   local dest="$1" f
   for f in README.md LICENSE-MIT LICENSE-APACHE NOTICE THIRD-PARTY-LICENSES.txt; do
@@ -52,14 +58,14 @@ copy_docs() {
 }
 
 # The app icon in every size a package needs, drawn by the CLI (no image files are committed):
-# $1 = the solvecraft-cli to run, $2 = output dir. Writes hicolor/<n>x<n>/apps/$APP_ID.png,
-# solvecraft.ico and solvecraft-1024.png.
+# $1 = the solidcraft-cli to run, $2 = output dir. Writes hicolor/<n>x<n>/apps/$APP_ID.png,
+# solidcraft.ico and solidcraft-1024.png.
 make_icons() {
   local cli="$1" out="$2" s
   for s in 16 24 32 48 64 128 256 512; do
     mkdir -p "$out/hicolor/${s}x${s}/apps"
     "$cli" icon --size "$s" --out "$out/hicolor/${s}x${s}/apps/$APP_ID.png" >/dev/null
   done
-  "$cli" icon --out "$out/solvecraft.ico" >/dev/null
-  "$cli" icon --size 1024 --out "$out/solvecraft-1024.png" >/dev/null
+  "$cli" icon --out "$out/solidcraft.ico" >/dev/null
+  "$cli" icon --size 1024 --out "$out/solidcraft-1024.png" >/dev/null
 }