Fix typing

Signed-off-by: Juan Luis Cano Rodríguez <[email protected]>

src/kedro_sphinx_theme/__init__.py

@@ -12,7 +12,7 @@
 THEME_PATH = (Path(__file__).parent / "theme" / "kedro-sphinx-theme").resolve()
 
 
-def env_override(default_appid):
+def env_override(default_appid: str) -> str:
     """Override Heap ID based on the build version."""
     build_version = os.getenv("READTHEDOCS_VERSION")
 
@@ -24,7 +24,7 @@ def env_override(default_appid):
     return default_appid  # default to Development for local builds
 
 
-def _add_jinja_filters(app):
+def _add_jinja_filters(app: Sphinx) -> None:
     # https://github.com/crate/crate/issues/10833
     from sphinx.builders.latex import LaTeXBuilder
     from sphinx.builders.linkcheck import CheckExternalLinksBuilder
@@ -35,14 +35,14 @@ def _add_jinja_filters(app):
         app.builder.templates.environment.filters["env_override"] = env_override
 
 
-def _override_permalinks_icon(app):
+def _override_permalinks_icon(app: Sphinx) -> None:
     # https://github.com/readthedocs/sphinx_rtd_theme/issues/98#issuecomment-1503211439
     app.config.html_permalinks_icon = "¶"
 
 
-def setup(app: Sphinx):
+def setup(app: Sphinx) -> None:
     """Register theme."""
-    app.add_html_theme("kedro-sphinx-theme", THEME_PATH)
+    app.add_html_theme("kedro-sphinx-theme", THEME_PATH.as_posix())
 
     app.connect("builder-inited", _add_jinja_filters)
     app.connect("builder-inited", _override_permalinks_icon)