feature/forgotPassword

[hannahnier]

• create new pages, components & utils for forgotPassword and resetPassword
• update router accordingly

[nadjascodejourney]

.... ...

[hannahnier]

Thanks for the good advice! I have unified the NavLinks and Links. Also, I have harmonized a couple of things now that the other PRs were merged. Here is what has changed since your last review:

• Unify all links outside of nav bar (Link instead of NavLink - because the nav functionality is not necessary here)
• Unify styling of links to other pages (at LoginTabs, RegisterTabs, ForgotPasswordTabs)
• Merge the latest updates on "dev" into this branch (so there should be no more merge conflicts)

I hope everything makes sense. Otherwise, just let me know :)