Issue: User registration and edit on same page (#35)

client/src/app/app-routing.module.ts

client/src/app/models/user.model.ts

client/src/app/posts/post-list/post-list.component.ts

client/src/app/shared/select/select.component.scss

...sers/user-guest-profile/user-guest-profile.component.html

...r-profile-edit-form/user-profile-edit-form.component.html

...r-profile-edit-form/user-profile-edit-form.component.scss

...rofile-edit-form/user-profile-edit-form.component.spec.ts

...ser-profile-edit-form/user-profile-edit-form.component.ts

...nt/src/app/users/user-profile/user-profile.component.html

...r-registration-form/user-registration-form.component.html

...ser-registration-form/user-registration-form.component.ts

client/src/app/users/user.module.ts

server/src/controllers/authController/index.ts

server/src/controllers/postController/index.ts

server/src/controllers/userController/index.ts

server/src/models/user.ts