Add phone number validations for European countries

[jdegoes]

ISSUE

There is no constructor for zio.schema.validation.Validation which can validate a European country phone number.

NOTE: This is 50 tickets in one. Please signup for one or more of the tickets by checking them below.

• Albania
• Andorra
• Armenia
• Austria
• Azerbaijan
• Belarus
• Belgium
• Bosnia and Herzegovina
• Bulgaria
• Croatia
• Cyprus
• Czechia
• Denmark
• Estonia
• Finland
• France
• Georgia
• Germany
• Greece
• Hungary
• Iceland
• Ireland
• Italy
• Kazakhstan
• Kosovo
• Latvia
• Liechtenstein
• Lithuania
• Luxembourg
• Malta
• Moldova
• Monaco
• Montenegro
• Netherlands
• North Macedonia
• Norway
• Poland
• Portugal
• Romania
• Russia
• San Marino
• Serbia
• Slovakia
• Slovenia
• Spain
• Sweden
• Switzerland
• Turkey
• Ukraine
• Vatican City (Holy See)

SOLUTION

Using other constructors which already exist in zio.schema.validation.Validation (which include regex validation, string length checking, and numeric range checking), introduce a new constructor that satisfies the requirements of this issue.

object Validation {
  ...
  val phoneNumber<2-Letter CountryCode>: Validation[String] = ???
}

IMPACT

Increasing the number of constructors for Validation will make it far easier to use the validation package to

WHERE TO LOOK

• Schema validation

PROBLEMATIC ISSUES

Issue #248 must be completed first, or at least, this issue must be based off of #244.

[BalduinLandolt]

I'll try to get that one started by implementing Switzerland, but once I got the hang of it, I can continue with other countries too.

[marioaae]

I'll try to get into this as well and will start with Germany.

[BalduinLandolt]

@marioaae should we pair up, maybe? If you want to, just ping me on discord (I posted in the zio-schema channel, so you should easily be able to find me)

[subotic]

I will try Serbia.

[lmserrano]

I will try Portugal.

[tewecske]

I will do Hungary.

[jdegoes]

This ticket needs to be updated to reflect which validators have already been implemented, and which remain.

[BalduinLandolt]

I can't update the initial task, but I went through the list: all of the validations (and many more) are done, so this issue can be closed, I suppose.
(Only thing I noticed, in the comment the republic of North Macedonia is referred to as the republic of Macedonia, which isn't the official name any more.)