Add devcontainer definition

.devcontainer/Dockerfile

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+FROM mcr.microsoft.com/devcontainers/cpp:1-ubuntu-22.04
+
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends ninja-build libsdl2-dev libgtk-3-dev lld llvm clang-15
+
+ARG INSTALL_SDL2_VERSION_FROM_SOURCE="2.26.1"
+
+COPY ./install-sdl2.sh /tmp/
+RUN if [ "${INSTALL_SDL2_VERSION_FROM_SOURCE}" != "none" ]; then \
+        chmod +x /tmp/install-sdl2.sh && /tmp/install-sdl2.sh ${INSTALL_SDL2_VERSION_FROM_SOURCE}; \
+    fi \
+    && rm -f /tmp/install-sdl2.sh \

.devcontainer/devcontainer.json

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+{
+  "name": "Zelda64Recomp",
+  "build": {
+    "dockerfile": "Dockerfile",
+  },
+
+  // Features to add to the dev container. More info: https://containers.dev/features.
+  // "features": {},
+
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  // "forwardPorts": [],
+
+  // Use 'postCreateCommand' to run commands after the container is created.
+  // "postCreateCommand": "gcc -v",
+
+  // Configure tool-specific properties.
+  // "customizations": {},
+
+  // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+  // "remoteUser": "root"
+}

.devcontainer/install-sdl2.sh

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+#!/usr/bin/env bash
+
+set -e
+
+SDL2_VERSION=${1:-"none"}
+
+if [ "${SDL2_VERSION}" = "none" ]; then
+    echo "No SDL2 version specified, skipping SDL2 installation"
+    exit 0
+fi
+
+# Cleanup temporary directory and associated files when exiting the script.
+cleanup() {
+    EXIT_CODE=$?
+    set +e
+    if [[ -n "${TMP_DIR}" ]]; then
+        echo "Executing cleanup of tmp files"
+        rm -Rf "${TMP_DIR}"
+    fi
+    exit $EXIT_CODE
+}
+trap cleanup EXIT
+
+echo "Installing CMake..."
+
+wget https://www.libsdl.org/release/SDL2-${SDL2_VERSION}.tar.gz
+tar -xzf SDL2-${SDL2_VERSION}.tar.gz
+cd SDL2-${SDL2_VERSION}
+./configure
+make -j 10
+sudo make install
+
+if [ "$(uname -m)" == "x86_64" ]; then
+    sudo cp -av /usr/local/lib/libSDL* /lib/x86_64-linux-gnu/
+else
+    sudo cp -av /usr/local/lib/libSDL* /usr/lib/aarch64-linux-gnu/
+fi