Replace patchelf crack with Freeloader LD_PRELOAD approach

- Multi-stage Dockerfile: discover patterns from PMS binary (capstone),
  compile .so with zig (musl), layer onto lscr.io/linuxserver/plex
- Uses LD_PRELOAD instead of patchelf (which corrupts Plex's musl loader)
- Auto-discovery: broad structural patterns with string-anchored fallback
  (//feature) and relationship-based fallback (BITSET_REF within BS_INIT)
- hook.cpp uses __has_include for generated patterns with hardcoded fallbacks
- Custom wrapper.sh (no traffic_logger preload)
- Vendored Freeloader source (github.com/authrequest/Freeloader, AGPL-3.0)
- Removed stale plexmediaserver_crack.so binary
- Supports Plex 1.43.3+ (verified against 1.43.2 and 1.43.3)

Freeloader/.dockerignore

@@ -0,0 +1,76 @@
+# .dockerignore — keep the Docker build context small.
+#
+# Both docker/Dockerfile.* only need: build.sh, src/, third_party/.
+# Everything else is excluded so the daemon doesn't ship big/unrelated
+# files into the buildkit context.
+
+# VCS / secrets
+.git
+.gitattributes
+.mcp.json
+.env
+.env.*
+
+# Build outputs and toolchain
+build/
+Build/
+build-*/
+dist/
+toolchain/
+compile_commands.json
+
+# Compiled artifacts
+*.o
+*.obj
+*.lo
+*.a
+*.so
+*.so.*
+*.dll
+*.dylib
+*.exe
+*.out
+
+# Plex binaries / IDA DBs
+libsoci_core.so
+Plex_Media_Server
+*.i64
+*.idb
+*.id0
+*.id1
+*.id2
+*.nam
+*.til
+
+# Subprojects not part of the build
+windows/
+plex_relay/
+experimental/
+scripts/
+docs/
+
+# Docs and meta
+AGENTS.md
+README.md
+LICENSE
+.gitattributes
+
+# Python cruft
+__pycache__/
+*.py[cod]
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+.venv/
+venv/
+
+# OS / editor
+.DS_Store
+Thumbs.db
+.idea/
+.vscode/
+.cache/
+*.tmp
+*.log
+*.bak
+*.swp