feat: add lunch picker lab (JS only)

[zairahira]

Checklist:

• [x] I have read freeCodeCamp's contribution guidelines.
• [x] My pull request has a descriptive title (not a vague title like Update index.md)

Closes #428

[zairahira]

According to the sheet, the array methods like removing and adding elements come after this lab. However, at this point campers would know how to access and update items. Should I make changes according to that?

[Dario-DC]

There's a mismatch between the issue related to this PR and the sheet apparently. Unless the array methods are going to be introduced in the previous workshop (which I think has not been created yet) and then mentioned in the following videos.

Is that possible? @zairahira @jdwilkin4

[jdwilkin4]

I went ahead and updated it on the sheet. So push, pop, shift and unshift will be taught before this in the lecture block

[jdwilkin4]

I just added the workshop PR that will go before this lab

https://github.com/freeCodeCamp/CurriculumExpansion/pull/495

[zairahira]

@Dario-DC I have added a few more methods like push() and pop(). Let me know what you think of this one.

[moT01]

Just throwing out ideas - you could start with an empty array, or maybe just one item in it, and have them push several more instead of just one.

"You should create a adultsMenu array with one item, "Salad", in it. "You should use "push" to add three more food items to the adultsMenu array" "You should create a kidsMenu array with one item, "Pizza", in it. "You should use "push" to add two more food items to the kidsMenu array"

I think this works as-is, but I think that might make it a little better.

If you just want to update the user stories, I'll take another look @zairahira - or you can add something like my suggestion and update them if you want.

[zairahira]

@moT01 I have added a few more stories as suggested. Let me know what you think.