Feat: Setup + Document `date` and `time` input in a `Flutter` App

[nelsonic]

As noted by @panoramix360 in dwyl/mvp#140 (comment)
the MVP currently has text input for updating the timer.start and timer.stop:

Todo

• Follow the instructions in the core Material library to implement the DatePicker and TimePicker widgets and allow a person to interact with a DateTime object.

Note: The data does not need to be persisted to a "backend"; just on the device is fine. 📱
But if you want to get creative / use your imagination and make it a "guess the date game", that's fine too. 💭

• Once we've figured out the "basics" of the Material UI widgets,
  explore a more intuitive and faster interface.
  Specifically we don't want a "Modal" (Dialog) for inputting the DateTime. We want the timers input to expand below the item the way it currently does in the MVP so no context is lost.

• Ensure the App is deployed via GitHub Pages as a PWA. 📱

Research

There are many options available, e.g: https://fluttergems.dev/date-time-picker

Please feel free to do more research into this but remember to capture all of it.
And don't get tooo carried away as this feature is meant to be simple. 👌

[nelsonic]

@LuchoTurtle please drop a comment in this thread when you are able to take a look at it. 🙏

[LuchoTurtle]

Just to understand correctly: I'm going to replicate a simple local todo app (the person creates todo items), where each one has a start datepicker and end datepicker, which they can edit. Adding a starting and stopping timer would add more complexity and would deviate from this repo's original purpose.

Is this correct? If so, I'll take this on after getting through other issues

[nelsonic]

No need for Todo items. Literally just display a single DateTime on a page and allow them to update it. 📆 ⌚
This is a UI/UX quest and our objective is just to study the interface for inputting/updating the data. 📱

[LuchoTurtle]

Ok, I'll do that and showcase the values of the DateTime below (like JSON.stringify) just people can see the value change overtime.

[nelsonic]

Cool. What I was saying above about making it a Game that people play to "Guess the Date"
e.g: https://guess-the-date.com/party is way beyond the scope / our needs:

But we can drop a hint to hit in the end of the tutorial. 👍