feature/homepage

[D4ni3l8]

• The cardiomyopathy image is in the assets folder
• I removed the headers apart from the 'What is cardiomyopathy header'
• I made the page less wordy

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 6319bd2):

https://adv-web-grp1--pr59-feature-homepage-gz21g8au.web.app

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