break out page classes into modules in separate files

[securelyfitz]

right now the implementation of each 'page' is a class with an init and update function. all are in main.py

• [x] decide if they should all go in one file or be split into several
• [x] make sure each file and code.py have necessary imports
• [x] make sure move is properly tracked in git

[securelyfitz]

complete