Add devcontainer (#4491)

devcontainers can be used by IDEs/editors like VS Code to create a standardized development environment in a container

.devcontainer/Dockerfile

@@ -0,0 +1,24 @@
+FROM mcr.microsoft.com/devcontainers/cpp:1-debian-12
+
+# [Optional] Uncomment this section to install additional packages.
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends \
+    ca-certificates \
+    g++ \
+    git \
+    libbluetooth-dev \
+    libgpiod-dev \
+    liborcania-dev \
+    libssl-dev \
+    libulfius-dev \
+    libyaml-cpp-dev \
+    pkg-config \
+    python3 \
+    python3-pip \
+    python3-venv \
+    python3-wheel \
+    wget \
+    zip \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
+
+RUN pip3 install --no-cache-dir -U platformio==6.1.15