fix: replace Dockerfile and add new configuration files for dev-tools setup

dev-tools/base/Dockerfile

@@ -0,0 +1,31 @@
+FROM ubuntu:24.04
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+  ca-certificates git sudo tini jq \
+  && rm -rf /var/lib/apt/lists/*
+
+COPY --from=ghcr.io/jdx/mise:2026.3.5 /usr/local/bin/mise /tools/bin/mise
+
+# Always needed env vars for mise
+ENV PATH="/tools/bin:/tools/shims:${PATH}"
+ENV MISE_DATA_DIR="/tools"
+ENV MISE_CONFIG_DIR="/tools/config"
+
+# Installation and cache paths
+ENV MISE_CACHE_DIR="/tools/.cache"
+ENV MISE_INSTALL_PATH="/tools/bin/mise"
+
+# UV environment variables
+ENV UV_TOOL_BIN_DIR=/tools/bin
+ENV UV_PYTHON=3.11
+
+COPY mise.toml /tools/config/mise.toml
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+HEALTHCHECK --interval=5s --timeout=5s --start-period=300s --retries=5 \
+  CMD test -f /tools/.ready
+
+ENTRYPOINT ["/usr/bin/tini", "--", "/entrypoint.sh"]
+CMD ["sleep", "infinity"]