Add Python init diagnostics, AppImage build system, misc Linux fixes

- python: switch Py_InitializeEx → Py_InitializeFromConfig for explicit
  error reporting; add dladdr + fprintf diagnostics to trace which DSO
  Python symbols resolve to and whether Py_IsInitialized succeeds
- python: log RTLD_NOLOAD vs fresh-load outcome when promoting libpython
  to RTLD_GLOBAL
- build: add Docker-based AppImage build script (build.sh), update
  Dockerfile and build-inner.sh for AppImage-only workflow
- build: remove Flatpak support entirely; move AppImage metadata
  (desktop/metainfo/icon) from flatpak/ to data/
- Add Monster Hunter Wilds basic_games plugin
- .gitignore: exclude squashfs-root, build-source, flatpak-repo,
  __pycache__, fomod-plus-settings.ini
- Various Linux port fixes across wineprefix, processrunner, proton
  launcher, FUSE connector, instance manager, download manager,
  sanitychecks, and NaK Rust paths/runtime_wrap

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

1 files changed, 58 insertions, 0 deletions

diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..766e8d7
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Build Fluorine Manager using Docker.
+#
+# Usage:
+#   ./build.sh              # Build AppImage + staging dir
+#   ./build.sh shell        # Drop into the build container for debugging
+#
+# Prerequisites: Docker or Podman
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+# Auto-detect container runtime
+if command -v podman >/dev/null 2>&1; then
+    DOCKER=podman
+elif command -v docker >/dev/null 2>&1; then
+    DOCKER=docker
+else
+    echo "ERROR: Neither podman nor docker found in PATH"
+    exit 1
+fi
+IMAGE_NAME="fluorine-builder"
+CONTAINER_NAME="fluorine-build-$$"
+
+cd "${SCRIPT_DIR}"
+
+# Build the Docker image if it doesn't exist or Dockerfile changed
+echo "=== Ensuring build image is up to date ==="
+${DOCKER} build -t "${IMAGE_NAME}" docker/
+
+if [ "${1:-}" = "shell" ]; then
+    echo "=== Dropping into build container shell ==="
+    exec ${DOCKER} run --rm -it \
+        -v "${SCRIPT_DIR}:/src:rw" \
+        -w /src \
+        --device /dev/fuse \
+        --cap-add SYS_ADMIN \
+        "${IMAGE_NAME}" \
+        bash
+fi
+
+echo "=== Starting build ==="
+${DOCKER} run --rm \
+    -v "${SCRIPT_DIR}:/src:rw" \
+    -w /src \
+    --device /dev/fuse \
+    --cap-add SYS_ADMIN \
+    --name "${CONTAINER_NAME}" \
+    "${IMAGE_NAME}" \
+    bash /src/docker/build-inner.sh
+
+echo ""
+echo "=== Done ==="
+if ls build/*.AppImage >/dev/null 2>&1; then
+    echo "AppImage:  $(ls build/*.AppImage)"
+fi
+echo "Staging:   build/staging/"