update docs

mkdocs.yaml

@@ -1,5 +1,5 @@
 site_name: "RenderCV"
-site_description: A Python application that creates a CV in PDF from a YAML/JSON input file.
+site_description: LaTeX CV generator engine from a YAML input file.
 site_author: Sina Atalay
 copyright: Copyright © 2023 Sina Atalay
 site_url: https://sinaatalay.github.io/rendercv/
@@ -9,6 +9,7 @@ edit_uri: edit/main/docs/
 
 theme:
   name: material
+  custom_dir: docs
   palette:
     - media: "(prefers-color-scheme: light)"
       scheme: default
@@ -46,11 +47,12 @@ theme:
 nav:
   - Overview: index.md
   - User Guide: user_guide.md
-  - Code Documentation:
-      - Code Documentation: code_documentation/index.md
-      - __main__.py: code_documentation/__main__.md
-      - data_model.py: code_documentation/data_model.md
-      - rendering.py: code_documentation/rendering.md
+  - Reference:
+      - Reference: reference/index.md
+      - cli.py: reference/cli.md
+      - data_models.py: reference/data_models.md
+      - renderer.py: reference/renderer.md
+      - themes: reference/themes.md
 
 markdown_extensions:
   # see https://facelessuser.github.io/pymdown-extensions/extensions/inlinehilite/ for more pymdownx info