Visual enhancements

[Ankith-Cirgir]

1. add a new homepage background
2. enlarge team member images in frames
3. change schedule tab colors
4. update landing illustration

[rgbayrak]

• 2. enlarge team member images in frames >> updated all team member framed photos in google drive. They are in svg format and high res. Convert them to webp as you see fit. Let's use the names as is in the file names so that it is streamlined.
• 3. change schedule tab colors
• 4. update landing illustration >> changed yellow hues to green

merged straight into main!