Remove all existing code for fresh rewrite on new branch

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

docker/linux/Dockerfile

@@ -1,24 +0,0 @@
-FROM ubuntu:latest
-WORKDIR /workdir
-RUN apt-get update
-RUN apt-get install -y \
-  build-essential \
-  cmake \
-  python3 \
-  python3-pip \
-  python3-polib \
-  python3-pil \
-  libsdl2-dev \
-  libgl1-mesa-dev \
-  libzip-dev \
-  python3-dotenv \
-  python3-pyqt5 \
-  python3-opengl \
-  xz-utils \
-  liblzma-dev \
-  libbz2-dev \
-  zlib1g-dev \
-  libzip-dev \
-  libbz2-dev \
-  git \
-  libssl-dev