Update assignments and quick revision content: revise questions and add new facts for enhanced clarity and learning

Add visual diagrams to week pages & fix navbar

Add all missing assignment questions: A1 Q9-10, A2 Q3-8, A3 Q9-10 across all pages

Fix assignments: add A2 Q3-Q8, replace wrong A12 questions, update notice

Changed color

Add new extras.html file with comprehensive study guide content for ESD course

Remove app_file field (invalid for static sdk)

remove gitattributes

force rebuild

app_file in readme

removed index1.html

Chnage color

Added website files

initial commit