implement `mod` resource (% operator)

If we have division and multiplication operators, we should also have a modulo operator. However, currently it does not exist.

🦄 40/6
float ask(call(get('/'),40,6))
6.666666666666667
🦄 40*6
int ask(call(get('*'),40,6))
240
🦄 .editor
// Entering editor mode (^D to finish, ^C to cancel)
40%6

Uncaught Error: Unknown identifier '%'!
    at Object.<anonymous> (/Users/milimetr/Desktop/x/askql/dist/askvm/lib/run.js:70:15)
    at Generator.next (<anonymous>)
    at /Users/milimetr/Desktop/x/askql/dist/askvm/lib/run.js:8:71
    at new Promise (<anonymous>)
    at __awaiter (/Users/milimetr/Desktop/x/askql/dist/askvm/lib/run.js:4:12)
    at Object.run (/Users/milimetr/Desktop/x/askql/dist/askvm/lib/run.js:29:12)
🦄

This task is to create a mod resource and a % operator linked to this resource.

–

Dear new contributor,

If you have any questions on how to start, please write a comment with a tag: @czerwinskilukasz1 or @mhagmajer, or join our Discord Community and let us know there. We will be very happy to help you start! 😃 Hint for starters: As a starting point, take a look at src/askvm/resources/math/index.ts file, where a * operator and times resource are already linked or a couple of other ones and use them as an example.

Cheers, Łukasz (@czerwinskilukasz1) AskQL Core Developer

[czerwinskilukasz1]

%: https://github.com/xFAANG/askql/issues/264

[mhagmajer]

@czerwinskilukasz1 let’s do it in parser only for operators, div and mod and carry the discussion about unary % on a separate issue