Add documentation infrastructure

Add documentation infrastructure and some sample content.

Documentation is generated by sphinx using extensions to support
Markdown an restructuredText for simple documentation writing.

Signed-off-by: Bobby Noelte <b0661n0e17e@gmail.com>

docs/conf.py

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+# Configuration file for the Sphinx documentation builder.
+#
+# For the full list of built-in configuration values, see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+import sys
+from pathlib import Path
+
+# Make source file directories available to sphinx
+sys.path.insert(0, str(Path("..", "src").resolve()))
+
+# -- Project information -----------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+
+project = "Akkudoktor EOS"
+copyright = "2024, Andreas Schmitz"
+author = "Andreas Schmitz"
+release = "0.0.1"
+
+# -- General configuration ---------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
+
+extensions = [
+    "sphinx.ext.autodoc",
+    "sphinx.ext.autosummary",
+    "sphinx_rtd_theme",
+    "myst_parser",
+]
+
+templates_path = ["_templates"]
+exclude_patterns = []
+
+source_suffix = {
+    ".rst": "restructuredtext",
+    ".txt": "markdown",
+    ".md": "markdown",
+}
+
+# -- Options for HTML output -------------------------------------------------
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
+
+html_theme = "sphinx_rtd_theme"
+html_static_path = ["_static"]
+html_logo = "_static/logo.png"
+html_theme_options = {
+    "logo_only": False,
+    "titles_only": True,
+}