fix: address PR #31 and #32 review findings

- Dockerfile: fix LLVM apt repo codename (jammy → noble) for ubuntu:24.04
- build-linux.sh: add missing mkdir -p /wowee-build-src before tar extraction
- Dockerfile: remove dead ENV OSXCROSS_VERSION=1.5 and its unset
- CMakeLists: scope -undefined dynamic_lookup to wowee target only
- GameServices: remove redundant game:: qualifier inside namespace game
- application.cpp: zero out gameServices_ after gameHandler reset in shutdown

container/build-linux.sh

@@ -11,6 +11,7 @@ OUT=/out
 NPROC=$(nproc)
 
 echo "==> [linux] Copying source tree..."
+mkdir -p /wowee-build-src
 tar -C "${SRC}" \
     --exclude='./build' --exclude='./logs' --exclude='./cache' \
     --exclude='./container' --exclude='./.git' \