Change line_length of .formatter to 78

Add "Links" section to README.md

Change var name: next_month -> prev_month

Change line_length of .formatter to 80

Impl. select_date event handler

Impl. prev_month and next_month event handlers

Show all days for the current month

Show week days

Show current month and prev/next buttons

Impl. toggle_date_picker event handler

Show text input with today's date as the initial value

Apply :app layout to the home page

Create DaimonDatePicker.HomeLive and an empty heex template

Remove controllers; Clean up router.ex

Update README.md