Proper site type icons

[Samuel-Therrien-Beslogic]

• The project passes automated tests locally (build, linting, etc.).
• You updated the project's documentation with new changes.
• You've linked any issue this PR closes
• You reviewed your own PR and made sure there's no test/debug code or any obvious mistakes.

Make sure that the code wasn't copied from elsewhere (check one):

• This is your own original code
• You have made sure that we have permission to use the copied code and that we follow its licensing

Changes:

• Removed all unused icons
• Minified all svgs
• Map pins are now generic, they can take any element, whether text or icons
• Obsoleted canopeum_frontend/src/components/CustomIconBadge.tsx, IconBadge can now take a children
• Created a SiteTypeIcon component dedicated to mapping the side id to its appropriate icon, whether its material or custom
• • Remove barely used material-icons package (our material icons are currently loaded through Google's CDN)

Closes #272