Add end to end tests for front-end

[technotariat]

Using Playwright create a set of end to end tests to check the following user flows:

• Signing up
• Logging in
• Changing email for account
• Changing password for account
• Completing Onboarding
• Creating TodoBoard
• Deleting TodoBoard
• Renaming TodoBoard
• Creating Todo
• Renaming Todo
• Deleting Todo
• Moving Todo from day granularity TodoList to week granularity TodoList
• Progressing Todoboard active period forward a month
• Regressing TodoBoard active period back a month