Add table of contents generation and header ID processing to Articles class

- Implemented `generateTableOfContents` method to create a structured table of contents from article content.
- Added `processHeaders` method to ensure headers have unique IDs for linking.
- Updated `generateHeadersIds` to apply ID generation to headers in article content.
- Modified `article_full` method to include table of contents in rendered articles.
- Enhanced `submenu_details` and `subpages` methods in Menu class to support language ID.
- Updated caching mechanisms to include language ID for subpages and menu details.
- Refactored various methods in Articles view class for improved readability and consistency.
- Added new sftp configuration file for deployment settings.

.vscode/sftp.json

@@ -0,0 +1,12 @@
+{
+  "name": "inwestprofil.fr",
+  "host": "inwestprofil.pl",
+  "protocol": "ftp",
+  "port": 21,
+  "username": "ftp@inwestprofil.fr",
+	"password": "4wCFuWYSQlckbqGBT",
+  "remotePath": "/public_html",
+  "uploadOnSave": false,
+  "useTempFile": false,
+  "openSsh": false
+}