WIP Fixing `NavBar` Bugs 🐛

[gracebilliris]

This PR includes the following tasks:

• [x] Combining FAQ & LearningMaterialSummary Pages
• [x] Adding NLP question and answer for the new Learn More page.
• [x] Removing the LearningMaterialSummary page
• [x] Updating Cypress Test for Home Page
• [x] Removing LearningMaterialSummary Cypress test
• [x] Removing NavBar Cypress test
• [x] Removing About Cypress test
• [x] Removing FAQ Cypress test
• [x] Removing Text Font Customisation Cypress test
• [x] Renaming Summary and Emotion Cypress tests
• [x] Establishing the foundation for History Cypress test
• [x] Updating LearnMore Cypress test for new UI
• [x] Adding viewport setting for Cypress window size for About Page, Summary Feature, SentimentAnalysis, and EmotionAnalysis tests.

[gracebilliris]

UI Option 1 (two distinct sections for FAQ and Learning Material Summary Questions):

UI Option 2 (questions for both sections combined):

[gracebilliris]

UI Option 1 (two distinct sections for FAQ and Learning Material Summary Questions):

UI Option 2 (questions for both sections combined):

Going with UI Option 1 after discord discussion: