TODOs and Fixes

[notprowler]

todo fix

[notprowler]

[ ]using a duplicate email when signing up throws errors in backend
[ ]navbar
[ ]logout button func
[ ]homepage button
[ ]readme

[notprowler]

renaming routes, navbar, logout default on home page.

[notprowler]

logo on the chrome extension, renaming, bookmarks dont go onto, put logo on readme