Revert "Separated main.html's css to its own file"

This reverts commit fb82e85d1c37b21071dfdff063405d7a037aafdb.
Revert "Formatted profile.html to be more readable"

This reverts commit 715b716c56cb51560980d0a79b59ef09f74abf0b.
Revert "Added missing body closing tag in profile.html"

This reverts commit 6c29a283c5ab5a58d25a5dff7bc7c103091de293.
Revert "Moved script tags at the end of body"

This reverts commit bd7acd4c84ece0455e2de5b3adb64385b5d6cfd8.
Revert "Separated profile.html's css."

This reverts commit b6974816dd137d1ba7f3721b30a0e8cef05ddf24.
Revert "Restructured the static files and templates"

This reverts commit f977f88e39662600d9822cc3b14c515a6956042f.
Revert "Added default-avatar"

This reverts commit a16cdb6c4500fbd71ee5cb47d73b6d46e0fb6974.
Revert "Moved HTMLs to their own folder"

This reverts commit caa8508cb23bc7e5bc31abbd8db276e05084e19d.
Revert "Renamed achivement -> achievement in profile.html"

This reverts commit 3a45241f9d9ccbf629ef230898befc70ade8fb0f.