User settings

[OwenAThomasson]

My progress for this week included:

1. Adding routing to the settings page from the user nav bar
2. Creating components for student, teacher, and admin settings to allow future variation between different account types and their settings
3. Adding a page to the pages directory that loads the correct component based on user type
4. Adding a send password reset button that will send a link to the user's email on file with a link to reset password, and will disable for 10 seconds before being able to be pressed again
5. Adding light and dark mode functionality that updates the global variables and will be reflected everywhere including the theme settings side widget

Review my changes by:

1. Cloning issue_88 branch
2. Running npm run dev
3. Clicking the "Settings" option from the dropdown navbar

Settings Page Before:

Settings Page Now:

[LikhitaPulijala]

@OwenAThomasson Try to eliminate the bottom-right icon that was previously utilized for changing themes. Since we've now integrated it into the settings page, the icon at the bottom is no longer necessary.