chore: rename app from Solitaire Quest to Ferrous Solitaire

Updates all in-tree references:
- Android package: com.solitairequest.app → com.ferrousapp.solitaire
- APK name: solitaire-quest → ferrous-solitaire
- Data dir: solitaire_quest → ferrous_solitaire (across all 6 data modules + engine)
- Keyring service: solitaire_quest_server → ferrous_solitaire_server
- Android Keystore key: solitaire_quest_token_key → ferrous_solitaire_token_key
- Gitea repo: Rusty_Solitare → Ferrous-Solitaire (also fixes "Solitare" typo)
- Renamed pkg/solitaire-quest* → pkg/ferrous-solitaire*
- Updated ArgoCD, docker-compose, CI workflow, build script, all docs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pkg/ferrous-solitaire/PKGBUILD

@@ -0,0 +1,48 @@
+# Maintainer: funman300 <funman300@gmail.com>
+
+pkgname=ferrous-solitaire
+pkgver=0.1.0
+pkgrel=1
+pkgdesc='Cross-platform Klondike Solitaire with progression, achievements, and optional sync'
+url='https://github.com/funman300/ferrous-solitaire'
+license=('MIT')
+arch=('x86_64')
+makedepends=('cargo' 'rust')
+depends=(
+    'gcc-libs'
+    'glibc'
+    'alsa-lib'
+    'libxkbcommon'
+    'systemd-libs'   # libudev.so — required by Bevy input
+)
+
+# Build from the local workspace (two levels above this PKGBUILD).
+_srcdir="$startdir/../.."
+source=()
+b2sums=()
+
+prepare() {
+    export RUSTUP_TOOLCHAIN=stable
+    cd "$_srcdir"
+    cargo fetch --locked --target "$(rustc -Vv | grep host | cut -d' ' -f2)"
+}
+
+build() {
+    export RUSTUP_TOOLCHAIN=stable
+    export CARGO_TARGET_DIR=target
+    cd "$_srcdir"
+    cargo build --frozen --release -p solitaire_app
+}
+
+check() {
+    export RUSTUP_TOOLCHAIN=stable
+    cd "$_srcdir"
+    # Only test non-Bevy crates — Bevy integration tests require a GPU/display.
+    cargo test --frozen -p solitaire_core -p solitaire_sync
+}
+
+package() {
+    cd "$_srcdir"
+    install -Dm0755 -t "$pkgdir/usr/bin/" "target/release/solitaire_app"
+    install -Dm0644 LICENSE "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
+}