doc: add sphinx conf file

docs/conf.py

+# Configuration file for the Sphinx documentation builder.
+
+# -- Project information
+
+project = 'Batmen'
+copyright = '2021-2024, Maël Madon'
+author = 'Maël Madon'
+
+release = ''
+version = ''
+
+# -- General configuration
+
+extensions = [
+    # 'sphinx.ext.duration',
+    # 'sphinx.ext.doctest',
+    # 'sphinx.ext.autodoc',
+    # 'sphinx.ext.autosummary',
+    # 'sphinx.ext.intersphinx',
+]
+
+# intersphinx_mapping = {
+#     'python': ('https://docs.python.org/3/', None),
+#     'sphinx': ('https://www.sphinx-doc.org/en/master/', None),
+# }
+# intersphinx_disabled_domains = ['std']
+
+templates_path = ['_templates']
+
+# -- Options for HTML output
+
+html_theme = 'sphinx_rtd_theme'
\ No newline at end of file