Add Node.js setup and enable sane lists in MkDocs

Added .gitignore for Node.js and editor files, introduced package.json and package-lock.json with markdownlint dependencies, and enabled mdx_truly_sane_lists in mkdocs.yml for improved Markdown list handling.

gitignore.gitignore

@@ -0,0 +1,4 @@
+BuildPDF/
+.vscode
+.todo
+node_modules/

mkdocs.yml

@@ -62,9 +62,9 @@ markdown_extensions:
   - pymdownx.emoji:
       emoji_index: !!python/name:material.extensions.emoji.twemoji
       emoji_generator: !!python/name:material.extensions.emoji.to_svg
-  # - mdx_truly_sane_lists:
-  #     nested_indent: 2
-  #     truly_sane: True
+  - mdx_truly_sane_lists:
+      nested_indent: 2
+      truly_sane: True
  
 plugins:
   - search

package.json

@@ -0,0 +1,6 @@
+{
+  "dependencies": {
+    "markdownlint": "^0.38.0",
+    "markdownlint-cli2": "^0.15.0"
+  }
+}