docs: set up Sphinx/Read the Docs scaffold

.readthedocs.yaml

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+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.10"
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+python:
+  install:
+    - requirements: docs/requirements.txt

docs/.gitignore

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+_build/

docs/Makefile

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+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

docs/arduino-deviations.rst

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+Arduino API Deviations
+************************
+
+.. TODO: document any deviations from the standard Arduino API.
+
+Digital IO
+===========
+
+.. TODO

docs/conf.py

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+# Copyright (c) Infineon Technologies AG
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# http://www.sphinx-doc.org/en/master/config
+
+# -- Path setup --------------------------------------------------------------
+
+import os
+
+# Check if we're running on Read the Docs' servers
+read_the_docs_build = os.environ.get("READTHEDOCS", None) == "True"
+
+# -- Project information -----------------------------------------------------
+
+project = "Arduino Core for Zephyr"
+copyright = "2026 Infineon Technologies AG"
+author = "Infineon Technologies AG"
+
+# -- General configuration ---------------------------------------------------
+
+extensions = [
+    "sphinx_tabs.tabs",
+    "sphinxemoji.sphinxemoji",
+    "myst_parser",
+]
+
+autosectionlabel_prefix_document = True
+
+source_suffix = [
+    ".rst",
+]
+
+suppress_warnings = ["autosectionlabel.*", "epub.duplicated_toc_entry"]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ["_templates"]
+
+# Tell sphinx what the primary language being documented is.
+primary_domain = "cpp"
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = ["_build", "build", "Thumbs.db", ".DS_Store"]
+
+highlight_language = "c++"
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+html_theme = "sphinx_rtd_theme"
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ["_templates"]

docs/contributing.rst

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+Contributing
+*************
+
+.. TODO: contribution guidelines.

docs/env-setup.rst

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+Environment Setup
+*******************
+
+.. TODO: development environment setup instructions.

docs/hw-platforms.rst

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+Supported Boards
+******************
+
+.. TODO: list supported boards, one section per board.
+
+KIT-PSE84-AI
+=============
+
+.. TODO

docs/index.rst

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+*************************
+Arduino Core for Zephyr
+*************************
+
+Welcome to the Arduino Core for Infineon's Zephyr-based microcontrollers.
+
+.. toctree::
+   :maxdepth: 2
+   :caption: CONTENT
+
+   Introduction<self>
+   installation-instructions
+   hw-platforms
+   arduino-deviations
+
+.. toctree::
+    :maxdepth: 1
+    :caption: CONTRIBUTING
+    :hidden:
+
+    Introduction <contributing>
+    env-setup
+    run-tests
+
+License
+=======
+
+Please find the license file for this core `here
+<https://github.com/Infineon/ArduinoCore-zephyr/blob/main/LICENSE>`_.

docs/installation-instructions.rst

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+Installation Instructions
+**************************
+
+.. TODO: fill in installation steps.
+
+Integration in Arduino IDE
+===========================
+
+.. TODO
+
+Installation in Arduino CLI
+=============================
+
+.. TODO

docs/make.bat

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+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=.
+set BUILDDIR=_build
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.https://www.sphinx-doc.org/
+	exit /b 1
+)
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd

docs/requirements.txt

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+# This is a list of python packages used to generate documentation. This file is used with pip:
+# pip install --user -r requirements.txt
+sphinx>=7.2.6,<9.0.0
+sphinx-tabs
+sphinxemoji
+sphinx-rtd-theme
+myst_parser

docs/run-tests.rst

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+Running Tests
+**************
+
+.. TODO: how to run the test suite (see tests/README.md).